One-Sentence Definition
A solo block found is when your mining hardware successfully mines a complete block on its own, earning you the entire block reward plus transaction fees without splitting it with anyone else.
Why It Matters for Solo Mining
Finding a solo block is literally the whole point of solo mining—it’s your lottery win. When you mine solo, you’re competing against the entire network hashrate to find the next valid block, and when you succeed, you get 100% of the reward instead of tiny daily payouts from a pool. That moment when your little Bitaxe or other device actually finds a block is what makes all the waiting worth it—you just earned 3.125 BTC (as of 2026, after the latest halving) plus fees.
How It Works
When you solo mine, your hardware generates millions or billions of hashes per second, each one essentially a lottery ticket trying to solve the cryptographic puzzle for the current block. Your mining software (using protocols like Stratum or getblocktemplate) communicates with your node to get block templates and submit solutions. When you finally find a hash that meets the network difficulty target, your software broadcasts it to the Bitcoin network, and if other nodes validate it first, boom—you’ve found a solo block.
The block gets added to the blockchain with your coinbase transaction (the special transaction that creates new bitcoin), and after coinbase maturity (100 confirmations), the reward is spendable. Your luck determines how long this takes—you might find one in a week with a small miner, or it might take decades statistically.
Example
Imagine you’re running a NerdQaxe++ at 800 GH/s. Every hash it calculates is like buying a lottery ticket, and with Bitcoin’s current difficulty, you have roughly a 1 in 1.2 million chance per day of winning. One random Tuesday, your device finds a valid hash—congratulations, you just found a solo block worth over $200,000! That’s exactly what happened to someone with a Bitaxe Gamma who won despite having only a tiny fraction of the network’s power.