Catenaa, Thursday, July 10, 2025-A solo bitcoin miner overcame steep odds to solve block 903,883 late Thursday, earning the full subsidy and transaction fee reward worth nearly $350,000.
Using solo mining software from CKpool, the miner claimed a total of 3.173 bitcoins, equivalent to $348,948, consisting of 3.125 BTC in block subsidy ($343,709) and 0.048 BTC in fees ($5,239), according to Mempool blockchain explorer data.
CKpool developer Con Kolivas confirmed on social media that the miner, identified by the address bc1q~9sj3 with 2.3 petahashes per second (PH/s), faced about a 1 in 2,800 chance daily of solving a block, or roughly once every eight years.
The miner’s hashpower represents just 0.00026% of the estimated Bitcoin network hashrate of 874 exahashes per second (EH/s) on July 3.
Solo mining, in which miners work independently rather than in pools, carries a low probability of success but offers the potential to capture entire block rewards without sharing fees.
Many small miners join pools for steadier earnings, but some opt for solo mining in hopes of a windfall.
This is not the first notable solo mining win. In 2022, a miner with just 126 terahashes per second (TH/s) beat odds of 1 in 1.3 million to earn $260,000. More recently, a miner with a weekly 6.1 PH/s hashpower secured $327,625 by temporarily boosting power to 261 PH/s, likely via rented hashrate.
Kolivas noted no signs the latest miner rented additional compute power, suggesting a sustained solo operation, roughly equivalent to 11 Antminer S21 units valued around $3,780 each.
