About block 909,858
Bitcoin block 909,858 was mined by Unknown on August 13, 2025 at 1:33 PM UTC, 7 min 11 s after block 909,857. That is faster than the 10-minute average the network aims for: blocks come in bursts because finding one is pure chance.
It confirmed 3,863 transactions in 1.74 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 0.0211 BTC. With the 3.125 BTC subsidy of halving era 5, Unknown earned 3.1461 BTC for this block.
Block 909,858 is number 643 of 2,016 in difficulty epoch 451; 1,373 blocks remain until the next difficulty adjustment at block 911,231. The next halving is at block 1,050,000, 140,142 blocks after this one.
Its hash starts with 20 zeros: that is the proof of work, a number below the target that the whole network’s hashrate had to search for. Unknown found 17 blocks in the week before. Today the block has 64,819 confirmations, so it is settled beyond any practical doubt.