A solo Bitcoin miner has defied the odds by independently mining a block and earning a total reward of $347,455 using a mining rig that cost only $300. The event took place at block height 920,440 on Thursday at 7:32 pm UTC, as reported by Mempool.space data, and involved the miner running a solo mining pool on an Umbrel node through the Public Pool BTC service.
The miner received 3.125 BTC in block rewards and an additional 0.016 BTC in transaction fees, totaling approximately 3.141 BTC. Umbrel, the Bitcoin node infrastructure firm, celebrated the achievement, emphasizing "No middlemen. No third-parties. Just pure self-sovereignty in action." This feat is notable because the miner operated independently without joining collective hash pools, which is increasingly rare amid Bitcoin's high global hash rate dominated by industrial-scale operations.
This incident is part of a broader trend of solo mining successes in 2025. For instance, on February 10, a solo miner earned 3.15 BTC (including fees) worth over $300,000 at the time for solving block 883,181. Similarly, on March 10, another miner using a low-cost rig earned 3.15 BTC, and on June 5, a solo miner collected $330,086 for mining block 899,826. These wins highlight how small miners can still impact Bitcoin's ecosystem, promoting decentralization by competing against larger players.
The rise in solo mining coincides with increased interest in affordable, open-source mining hardware like Bitaxes rigs, which sell for as little as $155. While such devices contribute minimally to Bitcoin's overall hashrate, they support transparency and individual sovereignty. Meanwhile, Bitcoin's mining difficulty reached an all-time high of 126.98 trillion on June 1, underscoring the competitive landscape, but solo mining remains a symbol of personal empowerment in the crypto space.
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