Rare Event: Solo Miner Successfully Mines Bitcoin Block

On June 5, 2025, a rare event occurred in the Bitcoin network — a solo miner, not part of any large mining pool, independently mined block #848 691. For this achievement, the miner received a reward of 3.151 BTC, equivalent to approximately $330,386 at the time of the event.

According to the analytical service Mempool, the mining process used the Bitcoin Core 26.0 software. The miner's activity was routed through a node registered in Canada. No additional details about the miner’s identity, hardware specifications, or technical setup were disclosed.

The block reward consisted of two components: a standard fixed payout of 3.125 BTC, set after the April 2024 halving, and transaction fees totaling 0.026 BTC. Despite the modest size of the fees, the total payout in USD was impressive.

📈 Key point: At the time the block was mined, the network difficulty had reached an all-time high of 126.98 trillion, making solo block wins virtually impossible for an individual miner.

Experts estimate that the probability of such success was about 1 in 1.6 million — theoretically, a solo miner would need to mine for approximately 31 years to achieve this under normal conditions.

Strategy: The miner utilized the Solo CK Pool along with rented hashpower, achieving a sudden "hit" — roughly 1 in 3,050 at the current network hash rate. By temporarily renting computing power (~259 PH/s), the miner significantly increased their chances of success.

💡 It is worth noting that during the first half of 2025, there were already several instances of solo-mined blocks: block 887,212 (March 10), block 883,181 (February 10), and others — each rewarding solo miners with 3–3.2 BTC. This highlights a growing interest in solo mining using hybrid strategies.

The event surrounding block #848,691 once again demonstrates the ideological value of decentralization: individual participants, leveraging smart strategies and temporary resources, can still achieve success in today’s increasingly centralized Bitcoin ecosystem.

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