About block 921,254
Bitcoin block 921,254 was mined by ULTIMUSPOOL on October 28, 2025 at 11:12 PM UTC, 5 min 51 s after block 921,253. That is faster than the 10-minute average the network aims for: blocks come in bursts because finding one is pure chance.
It confirmed 4,132 transactions in 1.64 MB (99.8% of the 4 million weight-unit limit). The median transaction paid 1.00 sat/vB, up from 1.00 sat/vB in the block before, and all fees added up to 0.0182 BTC. With the 3.125 BTC subsidy of halving era 5, ULTIMUSPOOL earned 3.1432 BTC for this block.
Block 921,254 is number 1,959 of 2,016 in difficulty epoch 456; 57 blocks remain until the next difficulty adjustment at block 921,311. The next halving is at block 1,050,000, 128,746 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. ULTIMUSPOOL found 0 blocks in the week before. Today the block has 52,289 confirmations, so it is settled beyond any practical doubt.