About block 921,621
Bitcoin block 921,621 was mined by MARA Pool on October 31, 2025 at 2:08 PM UTC, 14 min 53 s after block 921,620. 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 3,379 transactions in 1.64 MB (99.8% of the 4 million weight-unit limit). The median transaction paid 3.00 sat/vB, up from 3.00 sat/vB in the block before, and all fees added up to 0.0421 BTC. With the 3.125 BTC subsidy of halving era 5, MARA Pool earned 3.1671 BTC for this block.
Block 921,621 is number 310 of 2,016 in difficulty epoch 457; 1,706 blocks remain until the next difficulty adjustment at block 923,327. The next halving is at block 1,050,000, 128,379 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. MARA Pool found 49 blocks in the week before. Today the block has 51,930 confirmations, so it is settled beyond any practical doubt.