Solving Seven

Featuring Dr James Grime. See https://brilliant.org/numberphile for Brilliant and 20% off their premium service & 30-day trial (episode sponsor).

More about 7's divisibility: https://www.youtube.com/watch?v=UDQjn_-pDSs

James Grime: https://www.singingbanana.com

More James on Numberphile: http://bit.ly/grimevideos

James Grime on Objectivity: https://www.youtube.com/watch?v=B4gzt8v401Q