About block 921,171
Bitcoin block 921,171 was mined by SpiderPool on October 28, 2025 at 11:01 AM UTC, 39 seconds after block 921,170. That is faster than the 10-minute average the network aims for: blocks come in bursts because finding one is pure chance.
It confirmed 4,609 transactions in 1.71 MB (99.8% of the 4 million weight-unit limit). The median transaction paid 0.00 sat/vB, and all fees added up to 0.0035 BTC. With the 3.125 BTC subsidy of halving era 5, SpiderPool earned 3.1285 BTC for this block.
Block 921,171 is number 1,876 of 2,016 in difficulty epoch 456; 140 blocks remain until the next difficulty adjustment at block 921,311. The next halving is at block 1,050,000, 128,829 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 52,355 confirmations, so it is settled beyond any practical doubt.