Solo miner nets 3.125 BTC block after beating 18,000-year odds

A solo miner using a $250 Bitaxe ASIC device mined a full Bitcoin block on July 12, earning the 3.125 BTC subsidy plus transaction fees.

The Bitaxe, an open-source miner drawing 15 to 25 watts, runs at roughly 1 terahash per second — a hashrate that makes the statistical expected wait time for a block approximately 18,000 years, according to data from solo mining pools CKPool and Braiins Solo.

A comparable setup operating at 6 TH/s would face daily odds of about 1 in 180 million. The winning device was running at even lower power. The block reward, worth between $200,000 and $270,000 depending on Bitcoin's price at the time, represents a return of roughly 800 to 1,080 times the hardware cost.

The event highlights a core property of Bitcoin's protocol: a $250 device carries the same theoretical probability per hash as a multimillion-dollar mining facility. Bitcoin's price showed no reaction, and the network continued producing blocks at the standard 10-minute average. Large-scale mining operations dominate the network's total hashrate and collect the vast majority of rewards.

Multiple solo mining successes by hobbyists running sub-10 TH/s miners have been reported between 2025 and early 2026, according to mining pool records. The Bitaxe's power consumption of 15 to 25 watts translates to a few dollars per month in electricity costs at typical residential rates.

For hobbyists considering solo mining, the economics resemble entertainment spending rather than an investment thesis. At 1 TH/s against current network difficulty, the expected wait time stretches to 18,000 years. But as this event demonstrates, statistics describe populations, not individual outcomes.

This article is for informational purposes only and does not constitute investment advice.