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## Numberphile

Joined Sep 15, 2011

Videos about numbers - it's that simple. Videos by Brady Haran

# Video

**Catalan's Conjecture - Numberphile**

6 days ago

**Superpermutations - Numberphile**

22 days ago

**Tree Gaps and Orchard Problems - Numberphile**

25 days ago

**Cannons and Sparrows - Numberphile**

29 days ago

**The Square-Sum Problem - Numberphile**

Month ago

**Ham Sandwich Problem - Numberphile**

2 months ago

**Don Bradman's Duck - Numberphile**

2 months ago

**An astonishing old calculator - Numberphile**

2 months ago

**78557 and Proth Primes - Numberphile**

3 months ago

**The Ideal Auction - Numberphile**

3 months ago

**Pancake Numbers - Numberphile**

3 months ago

**The Enormous TREE(3) - Numberphile**

4 months ago

**Juggling by Numbers - Numberphile**

4 months ago

**Casting Out Nines - Numberphile**

5 months ago

**The Trinity Hall Prime - Numberphile**

5 months ago

**Braids in Higher Dimensions - Numberphile**

6 months ago

**When do clock hands overlap? - Numberphile**

6 months ago

**Aaron Numbers - Numberphile**

6 months ago

**Derangements - Numberphile**

6 months ago

**The Kolakoski Sequence - Numberphile**

7 months ago

**Large Gaps between Primes - Numberphile**

7 months ago

**Math vs Physics - Numberphile**

7 months ago

**A Quick Cake Conundrum - Numberphile**

8 months ago

**4D MONKEY DUST**

8 months ago

**13532385396179 - Numberphile**

8 months ago

**A Nice Square - Numberphile**

8 months ago

**Squared Squares - Numberphile**

8 months ago

**Gödel's Incompleteness Theorem - Numberphile**

8 months ago

**210 is VERY Goldbachy - Numberphile**

8 months ago

**Goldbach Conjecture - Numberphile**

9 months ago

**Speed Unboxing - Calculator Unboxing #9**

9 months ago

**Chaos Game - Numberphile**

9 months ago

**A 10,958 Solution - Numberphile**

10 months ago

**The 10,958 Problem - Numberphile**

10 months ago

**Twin Prime Conjecture - Numberphile**

10 months ago

**Reflected Cats - Numberphile**

10 months ago

**Collatz Conjecture in Color - Numberphile**

10 months ago

**The Moving Sofa Problem - Numberphile**

11 months ago

**The Four Color Map Theorem - Numberphile**

11 months ago

**The World's Best Mathematician (*) - Numberphile**

11 months ago

**Pascal's Triangle - Numberphile**

11 months ago

**Stable Rollers - Numberphile**

11 months ago

**Problems with Periodic Orbits - Numberphile**

11 months ago

**The Illumination Problem - Numberphile**

11 months ago

**383 is cool - Numberphile**

Year ago

**The Four 4s - Numberphile**

Year ago

**RSA-129 - Numberphile**

Year ago

**Sandpiles - Numberphile**

Year ago

**Balancing a Ruler - Numberphile**

Year ago

**Incredible Formula - Numberphile**

Year ago

**e (Euler's Number) - Numberphile**

Year ago

**Super Bottle - Numberphile**

Year ago

**Mondrian Puzzle - Numberphile**

Year ago

**Lace Knot Trick - Numberphile**

Year ago

**Fair Dice (Part 2) - Numberphile**

Year ago

**Fair Dice (Part 1) - Numberphile**

Year ago

**Paper Calculator - Numberphile**

Year ago

**Penney's Game - Numberphile**

Year ago

**Little Fibs - Numberphile**

Year ago

Ricky Johnson4 years agoHihi!! Can u create a video about the date 21.12.12? Or one about card counting because I got interested in the maths after watching 21. Hahaha. Thank you! :)

Inaxos Group4 years agoi've been plotting several equations/functions in a program named "Graph" and found that x^2=2^x has a weird solution. 2 and 4 ok but -0.766...???. Any explanation on how this comes up??? And i also need to find similar programs like graph, even better ones.

Josh Audibert4 years ago@KevinPagan, your theorem doesn't work, unless there is a plus instead of a minus between the two fractions. ((n+1)/2)+((n-1)/2) is just (n+1+n-1)/2 which is 2n/2 which is simply n.

musikSkool4 years agoFermat's Last Theorem. What is the simplest proof?

Kevin Pagan4 years agoHey numberphile! So my calculus class and I were learning about number theory, and we made this really cool theorem, and I want to see if you guys can prove it: Every odd integer can be written as a difference of integers. If n is an odd integer, then n can be written as n=((n+1)/2)-((n-1)/2)

Austin Prunty4 years agoHello, I am a huge fan and love math. I saw your video on Graham's Number and did research on it and am wondering more about Ramsey Theory. It would be awesome if you did a video on it. :D

Mike S4 years agoWhere's the video for Euler's Number (e)? Thought for sure there would be a god video explaining it. Anyways, really enjoy the videos, well done.

MrVickilatombe4 years agoHey! Do you know the number 142 857? It is fassinating. Multiplie it by 2, by 3... by 6 and it will have the same figures in the same order. Multiplie it by 7 and boom! Multiplie it by any other numbers and add the milions to the units and you'll have the same chain again (for example: 142 857 X 6 981 = 997 284 717 --> 997 + 284 717= 285714). Freaky mmh? Discovered by Lewis Carroll.

prakash mandumula4 years agobefore the invention of zero, how the things are counted that are more than 9?

Jennifer Grove4 years agobtw, the enneagram will be next. :-/

Jennifer Grove4 years agoI was up until like 6am the other night/morning trying to figure out how to make a heptogram using a compass and straight edge. >.< Can you help? I know that you can't divide a line into thirds, but you CAN multiply. So if multiplication is used, can it be done?

twiddle71254 years agoIs there a way to prove/disprove that amongst other sets, the one with greatest product of its elements will always be the one with the greatest sum? Except for cases involving 0's and 1's I can't imagine otherwise but I want to know if there's a way to formally prove this. Thanks!

Derpy Pig4 years agoCan you make a video about approximations about pi, like 22/7 or 355/113? Thanks

lizziemadify4 years agoHi, how about something regarding Hilbert's hotel, or that there are infinitely more irrational numbers than rational ones?

John Bright4 years agoHey Numberphile, could you post a video explaining "Set Theory" or "Russell's Paradox"?

DAVINDER3134 years agoWhy is "7" the only single digit number with two syllables?

TheFuniestable4 years agoplease subscribe on my channel and i will subscribe to yours

@DaBIONACLEFan, You can't think of the biggest number (apart from infinity) because theres always a bigger number.... i.e. 10^10^10^10^10^10 is very huge, bigger than all the star in the observable galaxy, but theres a number bigger which is 10^10^10^10^10^10^10

Kelly Powel4 years agoHey, that was an awesome video Check it out tubetoolboxssecrets (.)com

Sanulay4 years agoYou could do a video on different finger counting systems such as finger binary, finger ternary, base 12 and the one where each hand represents a decimal digit. It's a common misconception that we can only count to ten on our fingers.

Oliver Hookins4 years agoHey Brady, still interested in seeing the full video of the TVclip watch counter technical background (i.e. 301 view video). Is this likely to be uploaded any time soon?

Binging_Channel4 years agoCan you say anything about Excel's random number generator? Is there a way using the graphs, formulae or anything else to show that Excel can/cannot produce random numbers?

tonylaps4 years agoLets see the Zeno's paradox in another way, what is the smallest step just before X=2 , when X is the value of the hand clap? whe just know it is not 2, is it 2.000000001 or 1.999999999? these are still big numbers if considering the amount of minimal space to move from X=2

Selim4 years agoHello, Could you make a video on the Hexadecimal system? Thanks

Darren3574 years agoYesterday was Euler's birthday. I was expecting a video about him. Hopefully how e^i(pi) =-1

oneMeVz4 years agoI love your videos! They're helping me learn things that were never taught in school! You guys mention "imaginary numbers" and "complex numbers" quite a bit - what exactly are these numbers and how/where are they used?

Vincent Avila4 years agoPlease drop by on my channel. Thanks

skyweb2go4 years agoCheck our videos as well.

Charles Criston4 years agoThanks for your videos, just what I was looking for!

Pierre Li4 years agoCould you make a video about harshad numbers please ? ^^ Just a suggestion... Btw, loved the video about Zeno's paradox.

Alan Douglas4 years agoI understand you guys are busy teaching maths but I am a huge fan and would absolutely love it if you could tell me why the military uses 6400 miliradians to a circle and how they get this number the term comes from a radian (6.2830 to a circle - well, there a bouts)

Del Gardner4 years agoYour unbelievable!!

Orlando Tax4 years agoYour videos are amazing. You explained it well.

Bobby Santiago4 years agoI am not surprise why you have lots of subscriber. Great video man.

DanielHigginz4 years agoPlease stop either recording or exporting in an interlaced video format. If 720p is: 1280x720 = 921,600pixels, than interlacing is half that being 460,800pixels. Standard Definition (SD) is: 720x576 = 414,720. So you're only exactly 10% above SD which is likely unnoticeable.

pk tutorials4 years agonumberphile is cool

Luis Diaz4 years agoYou are a good teacher :)

guest17544 years agoCan you please talk about algebraic structures, spinors, manifolds and all that abstract stuff that's closely related to symmetry in physics? Would be fun to know your point of view about these things...

Stephen Hill4 years agoCan you do tutorial for logarithm? Thanks!

mechwurm4 years agoYou should do a video on epic math fails in history

jeremy miller4 years agoCan you do a video on the antikythera mechanism?

Abhiram Haritas4 years agoHey Brady! Greetings from India! I really like your style of videos and unique way of having different channels for different subjects :) But, please can u make one on Computer Science? It is something that, just like any other science, has a large appetite for curiosity!

Blake Watson4 years agonumerophile

TheNandato4 years agoFalse, outdated information on the Frane grading system, pointless wasting of pies... Numberphile, please do not relinquish quality just to output videos.

Charles25314 years agoExactly 128 videos. Or, 2^7.

downtownclownfrown4 years agoI love your videos but why are they so quiet? I can barely hear them in a silent room with my computer volume turned up all the way.

Stefan Lehmann5 years agoCan you talk about the Monty Hall problem? it's solution awesomely unintuitive

Julie Davis5 years ago[iminent typed]Je dirais que du mal de toi, t'est pas écolo![/typed]

UnDefinedLegacy5 years agoWould you do a video on Roman numeral usage in mathematics considering how Europeans did math before the introduction of Hindu-Arabic numerals?

margariins5 years agoKeep up the good work enriching youtube with stuff actually worth watching! If you are ever out of topics (as low as the probability may be) there's always cellular automata (The Game of Life).

William Yu5 years agoCan you make a video about the probability that a specific phone number is in the digits of pi?

americanfellow5 years agoi'm subbing you too. takes a lot to make my brain scintillate so i'm also faving you on my channel's "other channels you might enjoy" section

Adam Duncanson5 years agoHave you done any videos about Euler's formula? And if not, why not? It contain the 5 most unique number there are (not that i need to tell you guys) and explaining it would make a cool video.

Sanulay5 years agoCould you do a video about number systems with weird bases like pi, negative numbers and fractions?

Michael Nelson5 years agoI'm a huge fan of numberphile. Can you get a video explaining the golden ration thoroughly? I wish I could understand this high level math.

Cre8tvMG5 years agoI've really enjoyed your videos. I think they're some of the clearest explanations on the web, and very entertaining too. Can you please do a video introduction to imaginary numbers for a numerically challenged music major like me? I love your other videos - I'm fascinated with math and physics, but some things like i blow out my cerebral cortex.

TinyFoxTom5 years agoSay you have a function f(x,n). When n equals 0, f returns 1. When n equals 1, f returns x. F(x,2) = x^x, f(x,3) = x^x^x, f(x,4) = x^x^x^x, and so on. N represents the number of times x is written into the power tower. Now consider the gamma function. It is a generalization of the factorial function to the complex number plane, so you can have the factorial of a decimal. If f(x,n) generalizes the concept of a power tower to non-integer numbers, how would it be defined in order to determine numbers like f(x,2.5)?

capacamaru5 years agoWhy are there 360 degrees?

caramelman0085 years agoWould if be possible for you folks to make a video about Proth Primes? Thanks.

Austin Henderson5 years agoI wanted to know if there is actually a parallel universe of us

Abel Z5 years agoSolving the rubik's cube while juggling: watch?v=zAIPL5O9Uwk

motoast5 years agoHow about a video on how i^i a real number (and how how i relates to pi and e).

Dewight Johnson5 years agoHow are words like electrons?

JoseGoneBerserk5 years agoHI! ... do you have a video about e?? if not, please do one :) love your channel!

Dan Hunt5 years agoHey guys, love the channel! So, I was sitting in a math seminar the other day, and we started discussing something to do with limits (don't remember quite what) and one of the students made a claim that 0.9 repeating is actually equivalent to one. The professor dismissed it, saying that it approaches one, but never reaches it, a viewpoint that I agreed with. The next week the professor came in and took back his opinion, saying that the two were in fact equal, giving the argument that 3 * (1/3) = 0.9 repeating = 1. I am not satisfied by this explanation, so I was wondering if you guys could do a proof or disproof in a video. Thanks!

Stefan5 years agoYOU KNOW NOTHING ABOUT METH!!!!1

RostislavLuk5 years agoDo a 23 enigma!!!

n1cxz5 years agoHi Brady and James, James said during the Q&A that his doctorate and expertise was in group theory or math symmetries. This reminded me of a Andrew Wiles proof for Fermat's theorem: a^n + b^n = c^n iff n=2. Wiles said he found the shape of a doughnut to be a super symmetrical shape in disguise that helped him prove Fermat's theorem. If viewers would find this interesting, I would love it if James would expand on this in a video. best reguards, - Nix

Bruce Allen5 years agoLove your channel Brady! I've learned so much cool stuff from Numberphile! Is there any chance that you guys could teach us Americans about the Metric System?

AJ1T19955 years agohi im new could i get a subscribe plz thanks

jeremy miller5 years agoCan you do a video on the planck length and why we should thank the fractions for making our day to day math easier?

pipegomes1 〈CANAL ULTRA INACTIVO LOL〉5 years agoMaster yoda brought me here

007bistromath5 years agoI feel weird posting again so quickly, but I've noticed something pretty interesting. There's a guy who posted some time yesterday, Donald King. He's a bit odd, seems to be tying together different scientific fields with some numerological stuff that he claims is a spiritual revelation of some sort. However, what seems to have him in such a twist is something that's actually kind of neat about primes. They seem to really like being in base 7. They line up like rockettes and their digits are much less messy than with base 10. Of course, I'm just some guy with a handmade excel spreadsheet. I don't know if this pattern continues with primes big enough that the pros would get excited about them. Google isn't telling me whether anything has been done with this or not, but since 7 is tiny and prime, somebody's had to have, right?

jeremy miller5 years agoYou should make a list for the the googol, googolplex, graham's number, the newest mersene prime, infinity and all the other big numbers you cover on numberphile.

007bistromath5 years agoI watched three of these recently: penrose tiles, platonic solids, and the soccer ball. And now I've got tessellation stuck in my head, without the knowledge or talent to fully explore it, and Google keeps pointing me in odd directions. I wonder if you could do a video similar to the one for Penrose Tilings, but talking about polyhedrons; which ones can do it, whether there is any interesting knowledge about filing in gaps, etc. Also for polygons on a curved surface, like a ball. Another idea I've had is that you could do a video about mathematical cranks and/or historical mistakes. Every discipline attracts cranks, but mathematics seems to get loads of them. Because the beauty of math is intricate simplicity, it often even happens that something wrong will still be in some way interesting. I think a video (or three) about wrong-math might be fun to watch.

paulceltics5 years agothere is a great channel about numbers and all sorts of stuff as well called investary. that is the channel username as well

Donald King5 years agoI like your channel. Your most recent post regarding prime numbers is cool. I have something that will interest you greatly. On my channel, I recorded a video called "Universal Math". In this video, I demonstrate how prime numbers actually spell out structural building block logic (DNA sequencing). I also demonstrate how they're meant to be arranged (Stanislaw Ulam was incorrect), and I guarantee that this logic is irrefutable (*if you watch the video to the end, you will understand why). I think you should check it out. And if you do, and you're up for it, I would like to dialog about it with you. Cheers man.

Trevor Geene5 years agoYou should make Numberphile T-Shirts.

Cono Garcia5 years agoDo you have a video about e^(i*pi)? That would be interesting to understand..

Michael5 years agoNumberphile, Is it weird that I have some sort of preference for even numbers? I mean like when I am changing the volume on my computer or TV or whatever, I tend to keep the volume in even numbers when possible.

surrealnumber5 years agocan you do a video on primes in other base number systems? such as base 12 where 15 (base 10's 17) is a prime? or is it? well if you professors find this observation to be true, you can make an extra credit question on an exam "when is 15 a prime number?"

Clint Patac5 years agoI have a question, maybe you've answered it already, just point me to it, but my question is why are numbers base 10? Like after every 10 the pattern repeats, Why not base 8 then repeat or base 14 then repeat etc.. Discuss the number 10? Thanks..

Mad Dam5 years agoI have a question. Is there a way of doing exponents fast? For example: adding is fast counting multiplication is fast adding But is there a way to write 5^5 faster? like 5 with a 2 in a circle or 5^5^5 as a 5 with a 3 in a circle? If so are there even higher levels like 5 with a 5 in a circle can be 5 in a triangle or something.

lolera2225 years agoYou guys should do a vid. on the imaginary numbers or the complex ones (as far as i know, they are separate things like this [numbers[complex[imaginary[real] i ] c ] n ])

Alexander Christgau5 years agoHey numberphile! i have a quick question. Could you answer what is 3^3^3? so google says its 3^27 while excel says its 27^3.

luqman khan5 years agoim a huge fan from germany ....i mostly watch your videos cauz all of ou guys are realy congenial

jeremy miller5 years agoCan Philippa Gregory make an appearance on your channel?

ProjectFairTrade5 years agoLargest known prime number found by amateurs!! news.cnet.com/8301-1001_3-57567844-92/amateur-effort-finds-new-largest-prime-number/?part=pulse&subj=latest-news&tag=title

mujoman7265 years agoHi, I found this channel through the Periodic Table of videos and really enjoy the content! How about doing a video on the Four color theorem? Where on a map, you only ever need no more than 4 colors to ensure no 2 adjacent sides share the same color? Keep up the good work! Thanks!

Eliza G5 years agoYou have 327,222 subs...hang on like a second ago there was 327,221 subs...strange maybe you get 1 sub per second! Freggin epic!

Dan Adamowicz5 years agoI don't know if anyone else noticed, but they have made exactly enough video entries to push their episode on 11.11.11 all the way to spot 111. Fun stuff.

Corrupted Bytes5 years agoThese videos are very interesting. Thank you for putting them together Brady, and thank you to all of your guests.

Tin Xu5 years agoHi Numberphile. Just wondering will there be any videos regarding to day-counting coming up? I really hope you guys will make one. I am one of those who unfortunately have problems with counting days between two dates and get rent payment date wrong (I pay every fortnight) hence I hope I can find an answer on Numberphile. Thank you.

Bradley Grant5 years agoI've been watching numberphile for a while now. what bugs me is not that I have my calculator open on EVERY video. It's that I still have yet to open it before I start a video. I know i'm going to use it, so why wait.

paw1015 years agoSo, over the past week I've sat and watched (and liked!) every video on the numberphile page. What have I learned? THERE NEEDS TO BE MORE VIDEOS AS THEY'RE AWESOME!! =D

ExpectoMerlin5 years agocan u guys do one on 5138008

Kevin Crawford5 years agolike like like thank you!

vgoj5 years agohow about a video about the lottery?

Darryl Mayle5 years agoHello, I love the videos! :) Could you make a video explaining how this sum works as it is extremely fasinating: 111,111,111 x 111,111,111 = 12,345,678,987,654,321 Thank you!! :D

Raiko H.5 years agoplease make a vid about the cardano's method :D

Quick question, do you notice anything special about my username?

The Malloys5 years agoDid you ever get to post the TVclip views interview?

vorpalthefox5 years agoyou guys should talk about 2,147,483,647, the highest number in a 32-bit system

matijahhh5 years agoHi. You got very cool videos. I wanted to ask can you make a video about golden section. I think it would be an interesting theme.

Blueastrosailor5 years agoHi, you guys are amazing! I wish learning the maths I need to pass my a-level's was taught in such a fun and easy to understand way

Spacejunk5 years agodo e

TheMinecrafterBoyz5 years ago300 000 subs

TechnoBambino5 years agoHello there. I love your videos, they contain some of the most entertaining and interesting ideas in mathematics! I was wondering if you could possibly do an episode on easy ways to work out small maths problems that we could use day to day without having to work it out traditionally. Or perhaps show different ways in which other regions on earth work out problems, that is different to the western way of thinking. A good example of this is how the Japanese are taught to multiply various sizes of numbers using lines. It's sometimes referred to as the 'Verdic Method'. Anything like this would be interesting to watch and I think others will appreciate it to. Again thank you and keep up the good work!

Sven Hollstein5 years agoHi, I was wondering if you could cover quaternions some time. They're numbers with a real component and THREE imaginary components (r, i, j, k) that are often used to represent a rotation in three dimensional space. I've used them here and there but the specifics always baffled me, I never really understood what was actually going on with these numbers. Some sort of abstract explanation with suitable enthusiasm would be wonderful :)

My Universe5 years agoHello Numberphile, I have found your channel because I have watched some vids about prime numbers. But I have another strange question. There seems to be a strange connection between Hitler, Napoleon and the number 129, exactly the 129 years between certain comparable historical events. And I´m looking for a reasonable explanation or is it just a strange coincidence?

Christian Custo Blanch5 years agogoogol

yownina5 years agoHi guys! I have a suggestion. Will you guys create a video explaining minutephysics' video "Adding Past Infinity (WARNING: Math Ahead)", where he explains 1+2+4+8+16+...=-1, in a more detailed way so that we can rest the debate whether or not it's true. Thanks guys. I'm glad you have the time to read this :D

MultiRobotnik5 years agoI am not a Phile of numberphile

2,147,483,647 computer people know this

KevinAckeral5 years agocan you please do video about why for some coin systems, like {0.01, 0.05, 0.1, 0.25, 1, 2}, you can always make optimal change with the greedy algorithm (as many as you can fit of the biggest coin, then as many of the next, etc), but with some other coin systems you cannot? for example with {0.25, 0.1, 0.06, 0.01} and a desired change amount of 0.37, the greedy algorithm yields 0.25, 0.1, 0.01, 0.01, but a more optimal number of coins is 0.25, 0.06, 0.06. This fact is very cool to me but I've never been able to put my finger on what qualities a good set of coins should have

Ryan George5 years agodoppleganger

Syzygy5 years agoPlease please please please please please please please please oh please, as a new subscriber, I'd like to request a video about the Incompleteness and Completeness theorems (theora? theori?) by Godel and especially the whole "strange loops" concept also found in studies of the conscious brain (or so I understand). Incredibly interesting to lay people interested in science/math.

Taeke van der Kooi5 years agoHello Brady, could you please do a special about the "Fourier analysis". Me a chemical student interested in math and physics really want to know more about this. I know its found all over the internet but its just an interesting mathmatical usage in the practical world.

Taeke van der Kooi5 years agopi

BetaKeja5 years agoI see several video on pi why not one on the exponential constant?

DqwertyC5 years agoNot a math related question, but have you considered creating and selling numberphile t-shirts etc.?

bart4runescape5 years ago2147483647

yownina5 years agocan you guys please make a video about why 0!=1 and not 0!=0? My teacher says that that is its definition but I am not convinced. Thanks :D

PheelingM5 years agoHello Brady, I love your channels, particularly Numberphile and Sixty Symbols! Regarding themes for future videos, I suggest you do something on e, ln, and about Euler's identity: e to the i tau equals 1... ;)

Eben King5 years agoHi Brady. I've been a math/science geek since forever, and I love your channels. My mom is a retired math teacher and my dad used to work for NASA as a computer programmer, so I come by it naturally. I was playing the game "Robots" -- a different version was called "Daleks". In short, it's a turn-based game where evil robots always move toward you, but can only move on the 8 compass direction. If they hit each other or debris, they die and leave a debris pile. You can teleport to a random location. Can you explore the mathematics of this game? Thanks.

0Jrock015 years ago2013

Ilan Lifshits5 years ago2.73

TheMinecrafterBoyz5 years agoWhy is there 00,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15...35,and 36 in rolutte? i think having more numbers would make kasinos more money

TheMinecrafterBoyz5 years ago2013 vid?

Adam Udelhoven5 years agoFirst line I meant to to say plausibility not pliability

Adam Udelhoven5 years agoI'm not sure if you have ever got this question but I have been wondering about the pliability of a staple technology depicted in Space stories, and that is the Air shield seen in the docking bays of big space ships like the USS Enterprise or the Dearth Star. Ok so here is my question Lets pretend you have a docking bay that is 500 ft wide 500 ft long and... 150ft high. Assuming the air in the docking bay is pressurized to 15 pounds per square inch how much wight would that force field have to hold back in order to prevent the air form escaping in to space.

Tristan McElroy5 years agohexadecimal

MrBestfriend4215 years agocan you do a video on complex numbers?

marioandluigo12635 years agocan you subscribe to me i subscribed to you!

AKPYTHON5 years agoCan you please do a video on Fermat's Last Theorem.

matt155185 years ago8

Tin Xu5 years agoCan you guys talk about the pigeonhole's principle?

Aquamissile425 years agoI'm struggling to understand how Archimedes proved that a sphere's volume is two thirds of its circumscribed cylinder, it'd be great if you did a video on that!

This is my last name change and i used it wisely5 years agohere are the didgets in order lowest to highest that i know of: one, ten, hundred, thousand, million, billion, trillion, quadtrillion, quintillion, sextillion, septillion, octillion, nonillion, decillion, and centillion

jeremy miller5 years agoThis is off topic but I'm not sure where to ask this. Can start a channel that focuses on electricity(photons, electrons, cathodes, annodes, circuits, electrochemisty, electroengineering, electromagnetic force, etc..)?

Matt H.5 years agoI saw Matt on Natural born killers on discovery channel

marcel helder5 years agocan you make a video in wich you explain the equation : e^( iπ ) + 1 = 0 that woud be great!

BBQRubberDuckie5 years agowhen will we get to see the Fibonacci video you mentioned in the sunflower video!

jeremy miller5 years agoCan you do a video about the infinitesimal numbers? Specifically how the teaching of calculus is different using infinitesimals instead of limits.

FernestHall5 years agoI'd like to see more videos on numbers or concepts which have meaning/purpose/functionality and less about arbitrary rules (like smith numbers). Whenever a set of numbers is created by "adding the digits" (in the arbitrary decimal system) it is kinda random.

Nomad5 years agodear numberphile i believe that i have created a new theory on decimals and how they function i would be greatly appreciated it if we could arrange for us to talk about this preferably over skype

Roqueeee5 years agogoogol

whauk5 years agocan you make a video about the collatz conjecture?

Vaibhav Sharma5 years agoGoogle doodle for numberphile today :) YAY

And Euler's identity too.

Hi! Why not a video on squaring the circle and similar geometric problems?

Larry Bennett5 years agoHGH will keep you young.

Art of the Problem5 years agoHi Numberphile, long time viewer and fellow TVclipr. Curious if you'd like to become channel friends? Hope to hear from you! Thanks

Maxime De Kouchkovsky5 years agogogle

Ville Roininen5 years agoneper

VdevoV5 years agoBrady, you make the best videos. I do have a request for Numberphile. It'd be great for someone to explain Euler's Identity. e^{i \pi} + 1 = 0 It boggles my mind how a natural logarithm could be put to an imaginary power and how they came up with -1 for e^{i \pi}.

Madamnesia5 years agohello

jackthefuckingblack5 years agozombie

CarLovy Musicc5 years agoCHECK OUT THE CHANNEL . SUPPORT GREAT MUSIC

Stighg5 years agoeuiler

TheNERDpower925 years agoWould like to see a Video about the Goat Problem, wouldn't that be something for the show?

Nikita Fadeev5 years agoprime number

Keybrd5 years agosuper

Aziq Fadyan5 years agoHi, I just watch the video about 998001. Can you divide 1 by 998001 using the dozenal method?

WhyTauIsRight AndPiisWrong5 years agoNine more days until the apocalypse! Don't laugh at me. IT WILL HAPPEN. You will regret what you said to me.

Krimpie5 years agotheorem

Dian5 years agoFamous Numberphile Paper

Ashwin Rajashekar5 years agoyoutube

Chuck Norris5 years agoHi there, I'd enjoyed your channel, quite some interesting stuff there. Recently I was reading some papers about fast multiplication (Toom-Cook and the Schönhage Strassen algorithms) and I thought this stuff would fit perfectly here.

Miek Adriaens5 years ago666

Zac E5 years agoYou guys should make a video about gradians.

Sokshock5 years agoTVclip

Metaknightmare2175 years agoCan you guys make a video about transfinite numbers?

Eddy5 years agoradian

LoCoSt1999995 years agocan you decrypt thisnumber please? it is my facebook password... a friend found somehow and told me that it is so can ypu PLEASE CONVERT IT TO PLAIN TEXT TO FIND OUT??? i subscribed and have watched almost all of your videos! so please do me that favour! bb5beb8a43d3285ad882cb7554130629 thank you in advance

jeremy miller5 years agoI'd like to see videos on nonreal numbers.

AussieBro5 years agoSpelled it wrong anyways xD

AussieBro5 years agoOh srry i ment to search that on the channel :p

AussieBro5 years agoAtom

FifthElephant5 years agoHave you guys considered doing a video on the topic of metric time? I'd bet very few people know about the concept of time on a metric scale, and why we haven't adopted it (but maybe we should?)

click3535 years agopi

shonshrinks5 years agoYou guys are amazing!

Puddycat0422125 years agoDo you make Math tutorials especially Radical and Rational expressions?

wowsa05 years agoApparently if a group of people organise a secret santa system where each person is assigned someone else at random to give a gift to, the total number of possible arrangements is n factorial divided by e. Might make a good Christmas video.

Tibby77345 years agoAny chance you guys could do a video explaining and/or commenting on the value " * "? As used in combinatorial game theory? Maybe explain how it could be less than all positive numbers, yet greater than all negative numbers and not zero? Also how * + * = 0?! I figure if anyone can explain it properly, you can!

Tibby77345 years ago*

Fakezord5 years agonumbers

Fakezord5 years agocomplex

Vaibhav Sharma5 years agoI have a question - 360 degrees is in a plane. But if we want to talk about a sphere, how would we represent that. For instance, a light bulb gives out light in all directions but if we say it gives out light in 360 degrees that would mean in all directions in a plane. What is the analogy of a planar 360 degrees in (3 dimensional) space?

Neuralizer685 years agoperfect

Sarkill5 years agotour

Robert Polselli5 years agoimaginary

Mr. Zark5 years agoHi there, I really love this channel. And there is something I've been willing to request you guys: could you make a video about maths in a base other than 10? I've always been a fan of The Hitchhiker's Guide to the Galaxy, and there is the answer to life, the universe, and everything. That answer is 42, and later on we know the real question is "How much is 4 x 9?" I obviously knew that was wrong, but then I've been told that uses base 13, not base 10. So... if you understand my request, I'd like a little explanation and trivia about other bases. Also, sorry for my english, I'm not a native speaker. Thank you very much, love your channel!

OverLordGoldDragon5 years ago1.0x10^Googolplex Googolplex times. So that's ten to the Googolplex exponential levels, with Googolplex in each power level. I call it Hyperplex. But, is that number bigger than Googolplex Factorial? Are there Hyperplex Planck lengths in the Omniverse? Happy SolvsGiving!

JAYACH5 years agoGot a joke you might like: Q. How do you find the hypotenuse of pi? A. Cut the pi into a right angle triangle and find the hypotenuse of it! Mail me back if you like it

bobadillasebas5 years agoinfinite

HamboneHFY5 years agoGuys! Today is 21/11/12! There can't be all that many dates which are a palindrome, surely?

Twee Vue5 years agonumberphile You Have A Great Video. Thanks for keep us entertained

florakeee5 years ago-1

fastchill5 years agoPlease do an episonde on the beauty of Mandelbrot sets