Bitmain Antminer S17+ 70TH/s Miner. Miner Acquisitions. During the quarter, we purchased 100 Bitmain Antminer S19 Pro miners on the spot market. Subsequent to March 31, 2021, we purchased an additional 4,771 miners on the spot market, for a total purchase price of $21,091,966. These purchases will increase the Company''s maximum hash rate to 2,574 PH/S.