What is Graham's Number? (feat Ron Graham)

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Ron Graham explains the number which takes his name...
More links & stuff in full description below ↓↓↓

Graham's Number (Numberphile T-Shirt): http://bit.ly/Grahams_T-Shirt
See him discuss how big it is: http://youtu.be/GuigptwlVHo
Extra footage here: http://youtu.be/rGWuimr5CGQ
And our original Graham's Number video: http://youtu.be/XTeJ64KD5cg

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