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 at a reported 1.2 TH/s, for a block reward of 3.1493 BTC. It is one of the 44 blocks in the Solo Block Record as of , 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.
Quick answers
Who found block 889,975? The record does not name the miner. Block 889,975 was solo-mined on 29 Mar 2025 on Solo CKPool, reportedly on Bitaxe Gamma — 1.2 TH/s (reported) at 1.2 TH/s. The entry's source is mempool.space.
How was this record verified? The date, the reward and the pool tag were read from the chain itself, at block 889,975 on mempool.space. Hardware and hashrate are as reported at the time, by the source above. The entry is part of the Solo Block Record, version 2026-10-28, open data under CC BY 4.0.
An open record
This block is one entry in Solo Legends, the Solo Block Record: 44 solo-mined Bitcoin blocks found mostly 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 2026-10-28, 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.