Block 883,181 — solo-mined on 10 Feb 2025
untagged coinbase · 3.1581 BTC
Bitcoin block 883,181 was solo-mined on 10 February 2025 with no pool tag in its coinbase, for a block reward of 3.1581 BTC. It is one of the 40 blocks in the Solo Block Record, every one verified on the chain itself.
The smallest single device on this list: one 480 GH/s open-source Bitaxe — a third of a NerdQAxe, a millionth of the network — took a full block reward on its own.
The block's coinbase carries no pool tag; the win is documented by the Bitaxe community.
Key facts
| Date | |
|---|---|
| Block height | 883,181 |
| Pool (coinbase tag) | untagged coinbase |
| Hardware | a single 480 GH/s Bitaxe |
| Hashrate | 480 GH/s as reported |
| Network difficulty | 114.17 T |
| Block reward | 3.1581 BTC |
| Value, as reported | ≈ $300,000 then |
| Expected time to a block | 32,000 years |
| Chance on any given day | 1 in 12,000,000 |
| On-chain | mempool.space |
| Source | Solo Satoshi |
The odds
At that day's difficulty, a rig this size expected one block every 32,000 years — about 1 in 12,000,000 on any given day.
That is the one formula behind every odds line in the record: the network difficulty at that height, times 2³², divided by the reported hashrate — the expected time between blocks for that rig. Odds like these are why solo mining is a lottery, not a paycheck. Run the same math for your own hardware on the odds calculator.
Check it yourself
The date, the reward and the pool tag are read from the chain itself: open block 883,181 on mempool.space to check them. Hardware and hashrate are as reported at the time; this entry's source is Solo Satoshi.
An open record
This block is one entry in Solo Legends, the Solo Block Record: 40 solo-mined Bitcoin blocks found by small or home miners, each one verified on-chain. The whole record is open data — blocks.json · blocks.csv — licensed CC BY 4.0: use it anywhere, including commercially, as long as you say where it came from. Cite it as SoloLuck.io, “The Solo Block Record”, version 2026-09-14, https://sololuck.io/legends. Something wrong or missing? Tell us.
Solo odds are the same on every pool: your hashrate against the whole network's. See yours on the odds calculator, compare solo pools, or point a miner at SoloLuck — true-solo, with a 0% fee.