About block 921,666
Bitcoin block 921,666 was mined by SpiderPool on October 31, 2025 at 9:56 PM UTC, 51 seconds after block 921,665. That is faster than the 10-minute average the network aims for: blocks come in bursts because finding one is pure chance.
It confirmed 3,044 transactions in 1.90 MB (99.8% of the 4 million weight-unit limit). The median transaction paid 1.00 sat/vB, down from 3.00 sat/vB in the block before, and all fees added up to 0.0096 BTC. With the 3.125 BTC subsidy of halving era 5, SpiderPool earned 3.1346 BTC for this block.
Block 921,666 is number 355 of 2,016 in difficulty epoch 457; 1,661 blocks remain until the next difficulty adjustment at block 923,327. The next halving is at block 1,050,000, 128,334 blocks after this one.
Its hash starts with 20 zeros: that is the proof of work, a number below the target that the whole network’s hashrate had to search for. SpiderPool found 45 blocks in the week before. Today the block has 51,860 confirmations, so it is settled beyond any practical doubt.