The magnitude of Graham's Number is difficult to fathom - Ron Graham himself attempts to explain. WHAT IS the number: http://youtu.be/HX8bihEe3nA Extra footage: http://youtu.be/rGWuimr5CGQ Our original Graham's Number video: http://youtu.be/XTeJ64KD5cg Any errors in this video are mine (Brady's) in editing... For example 3^^^3 is actually even bigger than I say... Graham's Number is just too big for my small brain! See: http://wp.me/p46FUF-Yz Wikipedia page on Graham's Number: http://en.wikipedia.org/wiki/Graham's_number And the arrow notation used here: http://en.wikipedia.org/wiki/Knuth%27s_up-arrow_notation Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets: https://twitter.com/numberphile Google Plus: http://bit.ly/numberGplus Tumblr: http://numberphile.tumblr.com Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): http://bit.ly/MSRINumberphile Videos by Brady Haran Brown papers: http://bit.ly/brownpapers A run-down of Brady's channels: http://bit.ly/bradychannels