Matt Parker has a new favourite number - again! More links & stuff in full description below ↓↓↓ Some notes from Matt on how far he has investigated: https://www.numberphile.com/cannon-ball-numbers Matt's book "Humble Pi" via Maths Gear (signed and ships almost everywhere): http://bit.ly/Humble_Pi More Numberphile videos with Matt: http://bit.ly/Matt_Videos James Grime sphere packing: https://www.youtube.com/watch?v=CROeIGfr3gs Lucas Numbers: https://www.youtube.com/watch?v=PeUbRXnbmms 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 on this video 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 With special thanks to: Arjun Chakroborty Ben Delo Jeff Straathof Andy Yana Chernobilsky Christian Cooper Ken Baron Bill Shillito Ben Bernd Sing Dr Jubal John Tom Buckingham Andrei M Burke Adam Savage Matthew Schuster James Bissonette Robert Donato john buchan Joshua Davis Steve Crutchfield Jon Padden Valentin-Eugen Dobrota Eric Mumford Charles Southerland Arnas Ian George Walker Jerome Froelich Tracy Parry George Greene Igor Sokolov Alfred Wallace Bodhisattva Debnath Full Patron list at: https://www.numberphile.com/patrons