A solo Bitcoin miner operating with minimal computing power validated block 943,411 and earned 3.139 BTC on April 2. The reward, worth approximately $210,000 at current prices, included both the standard block subsidy and transaction fees.

The miner was running roughly 230 Terahash/s per second of computing power, representing about 0.00002% of Bitcoin's total estimated hashrate of around 1 Zhash/s.

Bitcoin mining involves racing to solve cryptographic puzzles using computational power to secure block rewards. Once the preserve of individuals mining on CPUs, an "arms race" in computing power has seen miners switch first to GPUs and latterly to specialized ASIC mining rigs. Nowadays, mining is mostly the preserve of large mining pools with massive amounts of computational power at their disposal—but solo miners do occasionally win the "lottery."

In a tweet, CKpool developer Con Kolivas said the miner had roughly a 1-in-28,000 chance of finding a block on any given day. For perspective, major mining operations like Riot Platforms operate roughly 30 exahashes—approximately 130,000 times the hashrate of Thursday's solo winner.

The miner used solo.ckpool.org, an anonymous solo mining pool introduced in 2014 that lets operators keep their full block rewards minus a 2% fee.

The solo miner's windfall comes as industrial-scale operations are shedding their Bitcoin holdings. Last week, Riot Platforms sold some $250 million worth of BTC, while MARA Holdings sold $1.1 billion in Bitcoin late last month, as part of a pivot to AI infrastructure.



While it’s a long shot for solo miners hoping to win block rewards, it happens surprisingly often. In December, a solo miner secured a $282,000 reward in just such a David-versus-Goliath scenario, swiftly followed by two separate miners who each won roughly $300,000 block rewards within days of each other in January, and another lucky miner who earned $200,000 after renting just $75 worth of hash power in February.

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