About block 917,173
Bitcoin block 917,173 was mined by ULTIMUSPOOL on October 1, 2025 at 3:44 AM UTC, 4 min 26 s after block 917,172. That is faster than the 10-minute average the network aims for: blocks come in bursts because finding one is pure chance.
It confirmed 5,907 transactions in 1.55 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 0.0081 BTC. With the 3.125 BTC subsidy of halving era 5, ULTIMUSPOOL earned 3.1331 BTC for this block.
Block 917,173 is number 1,910 of 2,016 in difficulty epoch 454; 106 blocks remain until the next difficulty adjustment at block 917,279. The next halving is at block 1,050,000, 132,827 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 56,363 confirmations, so it is settled beyond any practical doubt.