Block 853,742 — solo-mined on 24 Jul 2024
Solo CKPool · 3.1925 BTC
Bitcoin block 853,742 was solo-mined on 24 July 2024 on Solo CKPool, for a block reward of 3.1925 BTC. It is one of the 40 blocks in the Solo Block Record, every one verified on the chain itself.
The first famous Bitaxe-era block. Pool logs showed the address had started solo mining only 19 days earlier and reached ~3 TH/s the day before the win — 1-in-1.2-million daily odds, beaten in under three weeks.
Key facts
| Date | |
|---|---|
| Block height | 853,742 |
| Pool (coinbase tag) | Solo CKPool |
| Hardware | ~3 TH/s Bitaxe-class rig, 19 days into solo mining |
| Hashrate | 3 TH/s as reported |
| Network difficulty | 82.05 T |
| Block reward | 3.1925 BTC |
| Value, as reported | ≈ $200,000 then |
| Expected time to a block | 3,700 years |
| Chance on any given day | 1 in 1,400,000 |
| On-chain | mempool.space |
| Source | No BS Bitcoin |
The odds
At that day's difficulty, a rig this size expected one block every 3,700 years — about 1 in 1,400,000 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 853,742 on mempool.space to check them. Hardware and hashrate are as reported at the time; this entry's source is No BS Bitcoin.
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.