In order to receive a cryptocurrency reward (and record “legitimate” transactions in the ledger) miners are solving blocks’ hash that meet a certain criteria (established by system). A “guess number” is formed from a final hash of current block hash, nonce, data and previous block hash.
However, some of the largest Bitcoin mining farms in the world include: Dalian, China. Hashrate: 360,000 TH. Genesis Mining Farm, Reykjavik, Iceland. Hashrate: 1,000 GH. Moscow, Russia. Hashrate: 38 PH. GigaWatt, Washington, USA. Hashrate: 1.3 PH. Linthal, Switzerland. Bitfury, Amsterdam, Netherlands. Sep 9, 2021