A solo bitcoin miner has pulled off an extraordinary feat, solving a block on the Bitcoin network against odds so slim they’re compared to a once-in-a-century event. The miner earned 3.129 BTC—worth about $347,980—for mining block 913,593 on Sunday, according to data from Mempool.
A Rare Jackpot in Bitcoin Mining
The payout included 3.125 BTC in block subsidy rewards (around $347,509) plus 0.004 BTC in transaction fees (roughly $471). The win was recorded on solo mining platform CKpool, whose developer Con Kolivas congratulated the miner on X (formerly Twitter).
“Congratulations to miner bc1q~jr38 for solving the 307th solo block at solo.ckpool.org, with only 200TH!” Kolivas wrote.
Congratulations to miner bc1q~jr38 for solving the 307th solo block at https://t.co/UWgBvLkDqc, with only 200TH! https://t.co/t9icRGzf0K
— Dr -ck (@ckpooldev) September 7, 2025
A miner of this size only has a 1 in ~36,000 chance of solving a block each day, or once every ~100 years!
He noted the miner’s odds: about a 1 in 36,000 chance of solving a block each day—or once every 100 years on average.
To put that in perspective, the miner’s hashrate of 200 terahashes per second (TH/s) is equivalent to just one 2024 Bitmain Antminer S21 air-cooled machine. That represents a microscopic 0.00002% of the Bitcoin network’s estimated hashrate of 1.04 zetahashes per second (ZH/s) as of September 8. By comparison, industrial-scale miners like Marathon Digital (MARA) and Iris Energy (IREN) command hashrates of 59.4 exahashes and 50 exahashes respectively.
Why Solo Mining Still Attracts Risk-Takers
Most smaller miners join pools, where rewards are shared proportionally, providing steady but modest payouts. Solo mining, by contrast, is more like a lottery: the odds of winning are tiny, but the payoff is huge, since the miner keeps the entire block reward.
This isn’t the first time a small-scale operator has beaten the odds. In 2022, another solo miner with just 126 TH/s managed to mine a block, walking away with roughly $260,000. More recently, some solo miners with larger rented hashrates have also found blocks, though these wins remain exceedingly rare.
