Founded in September 2016, the BTCcom pool is a subsidiary of the mining equipment manufacturing company Bitmain, one of the most important in the world. Over the past few years, this pool has been the one that retains the greatest mining power in Bitcoin. The hash rate registered by BTCcom has been so high at times that network users have feared the possibility of 51% attacks or reorganization of blocks by pools belonging to Bitmain.
BTCcom has servers in China (Beijing and Shenzen), the United States and Europe, and currently provides about 13.8 exahashes per second of power, equivalent to 22% of Bitcoin's total hash rate. This pool offers a payment method known as FPPS (Full Pay Per Share), which consists of distributing the profits to its miners obtained from the rewards of each mined block, such as those that come from the transaction fees included in each block. The portion corresponding to each participant in the pool is calculated based on the mining power provided by each of them.