Mining Bitcoin with pencil and paper
by Ken Shirriff
If you think those mining-rigs are to expencive, let alone the loud bitmain antminers, then you should consider to geek all out and start mining SHA-256 blocks with pencil and paper. It can’t get cheaper.
Bitcoins are mined using a cryptographic algorithm called SHA-256. This algorithm is simple enough to be done with pencil and paper, as I show in this video. Not surprisingly, this is a thoroughly impractical way to mine. One round of the algorithm takes 16 minutes, 45 seconds which works out to a hash rate of 0.67 hashes per day.