Block 720,175 — solo-mined on 24 Jan 2022
Solo CKPool · 6.5580 BTC
Bitcoin block 720,175 was solo-mined on 24 January 2022 on Solo CKPool, for a block reward of 6.5580 BTC. It is one of the 40 blocks in the Solo Block Record, every one verified on the chain itself.
The third solo block in two weeks that January. The miner averaged 86 TH/s over the week, but at the moment the block was solved only 8.3 TH/s was actually online. The lottery does not check how many tickets you meant to buy.
Key facts
| Date | |
|---|---|
| Block height | 720,175 |
| Pool (coinbase tag) | Solo CKPool |
| Hardware | 86 TH/s weekly average — only 8.3 TH/s online at the solve |
| Hashrate | 86 TH/s as reported |
| Network difficulty | 26.64 T |
| Block reward | 6.5580 BTC |
| Value, as reported | ≈ $215,000 then |
| Expected time to a block | 42 years |
| Chance on any given day | 1 in 15,000 |
| On-chain | mempool.space |
| Source | Bitcoin Magazine |
The odds
At that day's difficulty, a rig this size expected one block every 42 years — about 1 in 15,000 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 720,175 on mempool.space to check them. Hardware and hashrate are as reported at the time; this entry's source is Bitcoin Magazine.
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.