With Matt Parker. This is a continuation from: https://www.youtube.com/watch?v=cjx23aMeBkQ The original trilogy of videos where this all started: http://bit.ly/GoldenTrilogy More Matt Parker videos on Numberphile: http://bit.ly/Matt_Videos Matt Parker's website Standupmaths (for more videos, books, merchandise, toys, talks, school visits, all that stuff) --- http://standupmaths.com/ Matt's book (US): http://bit.ly/Matt_4D_US Matt's book (UK): http://bit.ly/Matt_4D_UK Parker Square T-Shirts: https://teespring.com/stores/parker-shapes NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets: https://twitter.com/numberphile Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile Videos by Brady Haran Support us on Patreon: http://www.patreon.com/numberphile Brady's videos subreddit: http://www.reddit.com/r/BradyHaran/ A run-down of Brady's channels: http://www.bradyharan.com/ Sign up for (occasional) emails: http://eepurl.com/YdjL9