Belphegor's Prime... Don't miss the extra footage on Numberphile2: https://www.youtube.com/watch?v=9CcI5M1LfRs Belphegor Merch: http://www.bradyharanblog.com/blog/belphegors-prime-t-shirt More links & stuff in full description below ↓↓↓ This video features Professor Tony Padilla from the University of Nottingham. More Tony videos: http://bit.ly/Padilla_Numberphile 666 video: https://www.youtube.com/watch?v=UkZqFtYtqaI Beastly Primes: https://oeis.org/A131645 Belphegor Primes: https://oeis.org/A232448 Republican Primes: https://oeis.org/A125524 Democratic Primes: https://oeis.org/A125523 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 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