Two solo bitcoin miners independently found blocks 973262 and 973413 on consecutive days, according to reports and blockchain data cited in the excerpt. The first block was credited to a Futurebit Apollo Solo miner. The other miner reportedly used 16.2 terahashes per second of computing power and faced an estimated daily chance of success of about 0.0002%.
Solo miners can keep a block’s full reward rather than share it with a mining pool. Services such as Solo CKPool provide shared infrastructure while letting individual miners pursue their own rewards.