A small solo Bitcoin miner earned about $210,000 after successfully mining block 943,411, despite having very low computing power. The win is rare, with odds of around one in 28,000 per day, showing that even small miners can occasionally beat the system.

Russian authorities have placed Igor Runets, founder and CEO of BitRiver — one of the country’s largest Bitcoin mining companies — under house arrest as part of an investigation into alleged tax evasion, deepening the legal and financial challenges facing the firm.