About block 921,551
Bitcoin block 921,551 was mined by Foundry USA on October 31, 2025 at 1:04 AM UTC, 5 min 27 s after block 921,550. That is faster than the 10-minute average the network aims for: blocks come in bursts because finding one is pure chance.
It confirmed 5,129 transactions in 1.64 MB (99.8% of the 4 million weight-unit limit). The median transaction paid 0.00 sat/vB, and all fees added up to 0.0138 BTC. With the 3.125 BTC subsidy of halving era 5, Foundry USA earned 3.1388 BTC for this block.
Block 921,551 is number 240 of 2,016 in difficulty epoch 457; 1,776 blocks remain until the next difficulty adjustment at block 923,327. The next halving is at block 1,050,000, 128,449 blocks after this one.
Its hash starts with 21 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 51,975 confirmations, so it is settled beyond any practical doubt.