What does a share mean exactly, in satoshi?
Value of 1 share = block reward / difficulty
Block reward = 12.5 BTC + 10% bonus = 13.75 BTC = 1,375,000,000 satoshis
Difficulty (as of 2017/07/22): 804,525,194,568
Value of 1 share = block reward / difficulty = 1,375,000,000/804,525,194,568
Value of ...