A solo Bitcoin miner with just 2.3 petahash per second (PH/s) of hash power mined an entire block on 3 July, earning a reward worth nearly $350,000. The block was confirmed at height 903,883 and solved through CKpool’s solo mining service.
In Bitcoin mining, solo miners rarely solve blocks on their own. With current network difficulty, the probability of finding a block at 2.3 PH/s is roughly one in 375,000—based on estimates from SoloChance, a mining probability tool.
The result was confirmed by CKpool developer Con Kolivas, saying, “A miner of this size has about a 1 in 2,800 chance of solving a block every day, or once every 8 years on average.”
Data from Mempool.space shows the miner received 3.173 BTC, combining the block subsidy and transaction fees. That amount was valued at just under $349,000 at the time of the find.
Bitcoin researcher Pete Rizzo said the miner “beat incredible odds” to win the full block. The pool administrator added that the machine used likely consisted of older ASIC miners, linked together to reach a modest hashrate.
Although most of Bitcoin’s hash power comes from large farms, there have been a few solo wins this year. In June, another miner solved block 899,826. A similar case took place in February, both involving setups far below industrial scale.
Solo mining allows one user to claim the entire reward, but success depends entirely on chance. For that reason, many miners prefer joining larger pools to earn smaller, steady payouts.
Still, stories like this continue to attract individual miners who are willing to take the risk. Often rare but these wins show that even small setups can land a big reward, if luck is on their side.