About block 917,021
Bitcoin block 917,021 was mined by SpiderPool on September 30, 2025 at 5:45 AM UTC, 2 min 41 s after block 917,020. That is faster than the 10-minute average the network aims for: blocks come in bursts because finding one is pure chance.
It confirmed 3,815 transactions in 1.76 MB (99.8% of the 4 million weight-unit limit). The median transaction paid 1.00 sat/vB, down from 2.00 sat/vB in the block before, and all fees added up to 0.0103 BTC. With the 3.125 BTC subsidy of halving era 5, SpiderPool earned 3.1353 BTC for this block.
Block 917,021 is number 1,758 of 2,016 in difficulty epoch 454; 258 blocks remain until the next difficulty adjustment at block 917,279. The next halving is at block 1,050,000, 132,979 blocks after this one.
Its hash starts with 19 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 56,550 confirmations, so it is settled beyond any practical doubt.