Thanks Audible for sponsoring this video. Start a 30-day trial & receive a free audiobook at https://www.audible.com/numberphile or text numberphile to 500 500 More useful links & stuff in full description below ↓↓↓ Extra interview footage with Hannah in the recording booth: https://www.youtube.com/watch?v=Ci7VJNao5dU Hi-res version of the movie/book plot at: http://www.bradyharanblog.com/blog/movies-vs-books More videos with Hannah Fry: http://bit.ly/hannah_vids Hannah's website: http://www.hannahfry.co.uk/ Shout outs to Jordan Ellenberg and Walter Hickey. Discuss this video on Brady's subreddit: https://redd.it/9aypks 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/outreach/science-sandbox/ 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 Editing and animation by Pete McPartlan Patreon: http://www.patreon.com/numberphile Numberphile T-Shirts: null 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