anyone actually done 1 hash by hand?
I think it would take a while, there's a lot of rounds to do in a SHA-256 hash.
64 rounds? something like that
Seven months ago, with that difficulty, it would have cost you $3,162,791,285,103,330,000.00 per block just for paper and ink.
Source:
http://www.reddit.com/r/Bitcoin/comments/1r3wau/mining_bitcoin_by_hand/tl;dr - mining by hand is no longer profitable. (LOL)