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# The Problem with 7825 - Numberphile

Sitene ekle

**Published on May 17, 2018**

Signup for your free trial to The Great Courses Plus here: http://ow.ly/b5wA30hIviV (sponsor) More links & stuff in full description below ↓↓↓ James Grime on a proof involving Pythagorean Triples. James Grime: http://singingbanana.com (book him for a talk) More on the proof: https://www.cs.utexas.edu/~marijn/ptn/ Preprint of the paper: https://arxiv.org/abs/1605.00723 Ron Graham videos: http://bit.ly/Ron_Graham Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile We are also supported by Science Sandbox, a Simons Foundation initiative dedicated to engaging everyone with the process of science. https://www.simonsfoundation.org/outr... And support from Math For America - https://www.mathforamerica.org/ NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets: https://twitter.com/numberphile Subscribe: http://bit.ly/Numberphile_Sub Videos by Brady Haran Patreon: http://www.patreon.com/numberphile Brady's videos subreddit: http://www.reddit.com/r/BradyHaran/ Brady's latest videos across all channels: http://www.bradyharanblog.com/ Sign up for (occasional) emails: http://eepurl.com/YdjL9 Numberphile T-Shirts: https://teespring.com/stores/numberphile The Great Courses Plus is currently available to watch through a web browser to almost anyone in the world and optimized for the US, UK, and Australian markets. The Great Courses Plus is currently working to both optimize the product globally and accept credit card payments globally.

MrZanySlimeLook, another seemingly arbitrary number to use as clickbait! Classic Numberphile ;D

Zappa WomanI have synaesthesia only where numbers are concerned. As a child, I was trying to find a way to make the numbers add up in such a way that their respective colours would blend to give me the correct colour for their total. I quickly ran into the same problem you guys did.

Nigella Faragelol blue and red makes purple, so 7825 is purple, silly mathematicians

Aiden MidwinterProbably my favorite guy on Numberphile.

Ian JeffrayThat blue pen appears rather green

IgnacioWhat, a new Internet Comment Etiquette AND a new Numberphile video at the same time? is it Christmas already??''

Qba116I love these classic Numberphile videos where James Grime talks about one particular number

TheDirewolf 1234Ramsay theory : The formula to find lamb sauce.

WanderingRandomerThat blue pen didn't look very blue to me

pentixI have to do some calculus exercises...

Clingfilm ProductionsI bet I could do this for a^3 + b^3 = c^3

Horepit doesn't look blue because it's on brown paper.

Do the MathsI always get excited when James grime is on numberphile

Hawkeye...and those two days of supercomputation probably cost more than 100$ :)

Will PriceFine example of a Parker Grid at

kjruniaThe colour that blue pen produces is as blue as people hear Yanny.

kjruniaThat Rubik's Cube, though. Argh! Needs... solving... quickly... before my heart... argh... help!

Alex OrnelasThese things are interesting, but what I would like to see in these videos is more explanation of why it matters.I know he talks about not knowing why it is true, but I want to know why it matters at all. Why does it matter if you can or can't color in numbers a certain color in a formula?

TheLk0998So mathematics these days is just tricky colouring?

Dustin MorrowI found a pattern where a^2+b^2=(b+p)^2 made pythagorean triples if p was a factor of a. (lowest factor being 2 if a is even)