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 at a reported 3 TH/s, for a block reward of 3.1925 BTC. It is one of the 44 blocks in the Solo Block Record as of , 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.
Quick answers
Who found block 853,742? The record does not name the miner. Block 853,742 was solo-mined on 24 Jul 2024 on Solo CKPool, reportedly on ~3 TH/s Bitaxe-class rig, 19 days into solo mining at 3 TH/s. The entry's source is No BS Bitcoin.
How was this record verified? The date, the reward and the pool tag were read from the chain itself, at block 853,742 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.