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In the meantime, the basin’s miners are at full steam ahead. Salcido says he’ll have 42 megawatts running by the end of the year and 150 megawatts by 2020. Carlson says his next step after his current build-out of 60 megawatts will be “in the hundreds” of megawatts. Over the next five years, his company plans to raise $5 billion in capital to build 2,000 megawatts—two gigawatts—of additional mining capacity. But that won’t all be in the basin, he says. Carlson says he and others will soon be scaling up so rapidly that, for farsighted miners, the Mid-Columbia Basin effectively is already maxed out, in part because the counties simply can’t build out power lines and infrastructure fast enough. “So we have to go site hunting across the US & Canada,” Carlson told me in a text. “I’m on my way to Quebec on Monday.” As in oil or gold, prospectors never stop—they just move on.
The Bitcoin protocol was designed to encourage the distribution of hashing power among miners rather than its concentration. The reason? Miners wield power not only over which transactions get added to the Bitcoin blockchain but over the evolution of the Bitcoin software itself. When updates are made to the protocol, it is the miners, largely, who enforce these changes. If the miners band together and choose not to deploy an update from Bitcoin’s core developers, they can stall transactions or even cause the currency to split into competing versions.
Some nodes are mining nodes (usually referred to as "miners"). These group outstanding transactions into blocks and add them to the blockchain. How do they do this? By solving a complex mathematical puzzle that is part of the bitcoin program, and including the answer in the block. The puzzle that needs solving is to find a number that, when combined with the data in the block and passed through a hash function, produces a result that is within a certain range. This is much harder than it sounds.
Transactions are verified by network nodes through cryptography and recorded in a public distributed ledger called a blockchain. Bitcoin was invented by an unknown person or group of people using the name Satoshi Nakamoto and released as open-source software in 2009. Bitcoins are created as a reward for a process known as mining. They can be exchanged for other currencies, products, and services. Research produced by the University of Cambridge estimates that in 2017, there were 2.9 to 5.8 million unique users using a cryptocurrency wallet, most of them using bitcoin.