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Featuring Dr James Grime on Erdős–Woods Numbers. More links & stuff in full description below ↓↓↓ James Grime: https://www.singingbanana.com More James on Numberphile: http://bit.ly/grimevideos Erdős–Woods Numbers in the OEIS: https://oeis.org/A059756 (and see links to other related sequences, including https://oeis.org/A059757) Brown Numbers: https://www.youtube.com/watch?v=-Djj6pfR9KU Imaginary Erdős Numbers: https://www.youtube.com/watch?v=izdZPx89ph4 Patreon: http://www.patreon.com/numberphile Numberphile is supported by Jane Street. Learn more about them (and exciting career opportunities) at: https://bit.ly/numberphile-janestreet We're also supported by the Simons Laufer Mathematical Sciences Institute (formerly MSRI): http://bit.ly/MSRINumberphile Our thanks also to the Simons Foundation: https://www.simonsfoundation.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 Video by Brady Haran and Pete McPartlan Numberphile T-Shirts and Merch: https://teespring.com/stores/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