The biggest number we've ever tackled TREE of Graham's Number.
Supporting #TeamTrees on a quest to plant 20 million trees https://www.teamtrees.org/ (Original brown papers from this video available to support the campaign http://bit.ly/brownpapers)
More links & stuff in full description below ↓↓↓

Extra footage from this interview:    • TREE(Graham's Number) (extra)  Numbe...  

Big Numbers: http://bit.ly/Big_Numbers
More on Graham's Number:    • Graham's Number  Numberphile  
Ron Graham videos: http://bit.ly/Ron_Graham
More on TREE(3):    • The Enormous TREE(3)  Numberphile  

Moon Trees:    • MOON TREES  Sixty Symbols  
Video guides to Tree Species: http://bit.ly/TreesPlants

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/outr...

And support from Math For America https://www.mathforamerica.org/

NUMBERPHILE
Website: http://www.numberphile.com/
Numberphile on Facebook:   / numberphile  
Numberphile tweets:   / numberphile  
Subscribe: http://bit.ly/Numberphile_Sub

Videos by Brady Haran

Patreon:   / numberphile  

Numberphile TShirts: https://teespring.com/stores/numberphile

Brady's videos subreddit:   / bradyharan  

Brady's latest videos across all channels: http://www.bradyharanblog.com/

Sign up for (occasional) emails: http://eepurl.com/YdjL9