15,000 Pages of Calculations...

Michael Aschbacher of Caltech will be receiving the $75,000 Rolf Schock Prize for his part, among dozens of mathematicians who contributed, in the solution to the largest mathematical proof EVUH(!) involving the "Classification Theorem of Finite Simple Groups" (also, simply and appropriately known as "The Enormous Theorem").
Read all about it:

http://www.newscientist.com/article/dn20893-prize-awarded-for-largest-mathematical-proof.html