Bitmain is a privately - owned multi-national semiconductor company headquartered in Beijing, China, which is known for two things — one, for its range of industry gold standard bitcoin and other cryptocurrency mining equipment, Antminer, and two, for its operating one of the worlds largest bitcoin mining farms in Inner Mongolia, an autonomous region that's part of China. (globalcoinreport.com)
Bitfury is one of the largest bitcoin mining farms in existence, and very recently they have been working on blockchain analysis. (cryptotimes.news)
Georgia is home of one of the first bitcoin mining farms in the region. (coinstaker.com)