Block 889,975 — solo-mined on 29 Mar 2025
Solo CKPool · 3.1493 BTC
Bitcoin block 889,975 was solo-mined on 29 March 2025 on Solo CKPool, for a block reward of 3.1493 BTC. It is one of the 40 blocks in the Solo Block Record, every one verified on the chain itself.
The third Bitaxe-family block, weeks after the second. March 2025 was the month the open-source palm miners stopped being a joke: three wins for the class in one spring.
The original Bitaxe Shop write-up that reported the hardware is no longer online; the block itself remains chain-verified.
Key facts
| Date | |
|---|---|
| Block height | 889,975 |
| Pool (coinbase tag) | Solo CKPool |
| Hardware | Bitaxe Gamma — 1.2 TH/s (reported) |
| Hashrate | 1.2 TH/s as reported |
| Network difficulty | 113.76 T |
| Block reward | 3.1493 BTC |
| Expected time to a block | 13,000 years |
| Chance on any given day | 1 in 4,700,000 |
| On-chain | mempool.space |
| Source | mempool.space |
The odds
At that day's difficulty, a rig this size expected one block every 13,000 years — about 1 in 4,700,000 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 889,975 on mempool.space to check them. Hardware and hashrate are as reported at the time; this entry's source is mempool.space.
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.