According to Kolivas, the miner running a modest ~17 Terahashes per second (TH/s) is likely using a single S9 Bitmain Antminer unit. The S9 model Bitmain Antminer was released in 2017—the latest model, Antminer S19XP, in 2022.
Congratulations to miner 151XTfHBfaDqoNWGGeYobNX2YzFFWuB5YD with only ~17TH for solving the 275th block at https://t.co/UWgBvLkDqc! That is likely a single S9 miner. A miner of this size would only solve a block once every ~450 years on average https://t.co/1vGmN03qU6
— Dr. Con Kolivas (@ckpooldev) June 9, 2023
A hallmark of proof-of-work consensus algorithms, mining is the process by which blocks of transactions are added to a public blockchain—like Bitcoin, Dogecoin, and Litecoin—and verified. It’s also the process by which new coins are created. Mining secures the blockchain's integrity and incentivizes network participation.
The more rigs a miner has means more chances at lucrative block rewards and transaction fees.
'Very Lucky' Solo Miner Solves Bitcoin Block for $148K Reward
A "hash" can be thought of as a problem a computer, in this case, a miner needs to solve. A miner that can process a terahash can solve one trillion of these problems in a second.
The solo miners appear to all be using the Solo CK Pool mining service. In March, another solo miner used the service to solve Bitcoin block 780,112 for a 6.25 $BTC, around $148,000, at the time, reward.
The Solo CK Pool service touts itself as suitable for large mining farms, "regular miners," and miners with "old/inefficient miners that will never earn any rewards through regular mining that wish to leave it mining as a lottery."
The lottery has again paid off.
While Proof-of-Work miners dedicate hardware resources to secure the network, in comparison Proof-of-Stake “validators” dedicate their cryptocurrency, leading to claims that PoS blockchains are better for the environment as they consume less energy.