There is a mining pool called solo.ckpool.org. This Bitcoin mining ‘pool’ runs a high speed low latency node for solo mining, which means any solved block is more likely not to be orphaned by the network, unlike mining on your own bitcoin node from your home connection.
The current block reward being 12.5 bitcoins, many put an ASIC USB stick or smaller miners which have no hope of profiting. Someone recently found a block using a 1 TH/S S5, as can be seen on the official CK pool bitcointalk thread.
If you put a small miner that uses barely any power, you are ‘in’ with a chance at winning 12.5 BTC with little effort. Make sure you keep the private key to the wallet you are mining to, as the potential find would be nearly $100,000 USD per block at the current prices.
Every miner, even the smallest has a chance of solving a block, with the ‘golden nonce’ possible with even a single hash. All Bitcoin Blocks are solved by a ‘single’ hash out of the billions tried. For example a 15 GH/s USB miner will be trying 15 billion hashes per second, to try and mine a block.
CKPool Solo has a reputation of paying out. They also once failed to submit a block solving share by one of their solo miners due to a bug in the code when segwit signalling began. The owner of CK Pool paid the block reward of 12.5 Bitcoins from his own pocket, with a show of integrity not common among pool operators. This is shown here and also on the next page where he made the payout, here.
Nicehash’s solo pool made a bug similar to do with multisig addresses, and send the block solved coins to an address which no private key was known, as the person was mining to a multisig address. They refunded the hash paid for finding the block, but not the block quantity, which at the time was 25 Bitcoins. Nicehash posted about this this here.
Therefore, we would recommend strongly mining at solo.ckpool.org, especially with the amount of money involved, simply set your little stick miners up, and forget! Hopefully you hit the jackpot. All it takes is one hash.
There have been incidences where someone found a block with an S3, and then a year later the same rig produced a solo share that was very close to being a block. Luck is the name of the game here, so why not give it a go 🙂