About block 921,581
Bitcoin block 921,581 was mined by Foundry USA on October 31, 2025 at 7:09 AM UTC, 2 min 36 s after block 921,580. That is faster than the 10-minute average the network aims for: blocks come in bursts because finding one is pure chance.
It confirmed 4,262 transactions in 1.72 MB (99.8% of the 4 million weight-unit limit). The median transaction paid 0.00 sat/vB, down from 1.00 sat/vB in the block before, and all fees added up to 0.0093 BTC. With the 3.125 BTC subsidy of halving era 5, Foundry USA earned 3.1343 BTC for this block.
Block 921,581 is number 270 of 2,016 in difficulty epoch 457; 1,746 blocks remain until the next difficulty adjustment at block 923,327. The next halving is at block 1,050,000, 128,419 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. Foundry USA found 264 blocks in the week before. Today the block has 51,951 confirmations, so it is settled beyond any practical doubt.