About block 921,021
Bitcoin block 921,021 was mined by MARA Pool on October 27, 2025 at 11:50 AM UTC, 20 min 34 s after block 921,020. That is slower than the 10-minute target; long gaps are normal, since every hash attempt is an independent draw with the same tiny chance.
It confirmed 3,466 transactions in 1.61 MB (99.9% of the 4 million weight-unit limit). The median transaction paid 2.00 sat/vB, up from 1.00 sat/vB in the block before, and all fees added up to 0.0349 BTC. With the 3.125 BTC subsidy of halving era 5, MARA Pool earned 3.1599 BTC for this block.
Block 921,021 is number 1,726 of 2,016 in difficulty epoch 456; 290 blocks remain until the next difficulty adjustment at block 921,311. The next halving is at block 1,050,000, 128,979 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. MARA Pool found 50 blocks in the week before. Today the block has 52,559 confirmations, so it is settled beyond any practical doubt.