Mining blocks on a sheet of paper
Ken Shiriff went even further and tried a method of mining bitcoin, which does not require any devices. The developer solved the mathematical problems necessary for mining manually on a sheet of paper, and then independently entered the results of the calculations into the blockchain.
Solving one cycle of the algorithm required to extract the hash took Shiriff an average of 16 minutes 45 seconds. This provided 0.67 hash per day. The main disadvantage of this method is that mining stopped as soon as the programmer stopped making calculations on his own. For comparison, the on-board control computer, on which Shiriff also tried to mine digital coins, received a hash every 5 seconds.
