Key Takeaways
- A solo miner earned $330,386 by solving block 899,826.
- The miner likely used rented hashrate to briefly reach 259 PH/s.
- Bitcoin's mining difficulty hit a record 126.98 trillion on June 1.
A solo Bitcoin miner secured a $330,386 reward for mining block 899,826, despite network difficulty reaching a historic high of 126.98 trillion, according to Blockchain.com data.
Block confirmation & earnings
The block, confirmed at 3:48 a.m. UTC on June 5, included 3,680 transactions.
Using the Solo CK pool, the miner earned 3.125 BTC in subsidy and 0.026 BTC in transaction fees.
Mempool.space data shows the average transaction fee was just $0.29, reflecting low network congestion.
Hashrate & mining strategy
The miner was identified as having briefly ramped up their hashrate to 259 petahashes per second (PH/s), an unusually high figure for a solo operator.
Con Kolivas, administrator of ckpool, noted in a June 5 X post that this was almost certainly a case of hashrate rental.
He explained the account typically operates at much lower levels and likely used temporary cloud-based hashing power to “take a shot” at mining a block.
Increasing difficulty & rare wins
Solo mining successes are increasingly rare due to Bitcoin’s escalating difficulty, which adjusts every 2,016 blocks.
The latest record of 126.98 trillion reflects growing competition and increased network security.
Notable solo wins in 2025
Still, 2025 has seen a few notable solo wins.
On March 10, a miner earned 3.15 BTC (worth $263,000 at the time) for solving block 887,212.
Another solo miner took home over $300,000 for block 883,181 on February 10.
These occasional victories stand out in an environment where the odds of individual block success are continually shrinking.
