2011-11-28

[public] 4.41M views, 27.5K likes, 1.99K dislikes audio only

Numberphile

For many years, 8128 was the largest known perfect number. But what is a perfect number?

More links & stuff in full description below ↓↓↓

This video features Dr James Grime. James' own YouTube channel full of maths stuff can be found at http://www.youtube.com/singingbanana

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

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

Numberphile T-Shirts: https://teespring.com/stores/numberphile

Other merchandise: https://store.dftba.com/collections/numberphile