Block 21639
- Hash
0000001cb58bf52a427fd5aaaef11d8a6b90d50526bbe4fa94cf7114bcb41655- Confirmations
- 20481
- Time
- 2026-10-13 02:12:14 UTC
- Median time
- 2026-10-13 02:03:43 UTC
- Transactions
- 1
- Size
- 2,772
- Weight
- 10,980
- Difficulty
- 0.0031405554
- Bits
1e013e69- Merkle root
944c7d80efec4d8a2b18bfa61fd5cf03c0bf9b3a53a7b401682b52263b6034de- Previous block
- 00000020aa9d50e437f9a0cff9878d596f0017fa882ebf15797b435795b54560
- Next block
- 000000c755ba8aef38e12079ea28b11ee9cd74fda53c5b0e6efbfe5d6df24115
ML-DSA-44 block signature (M2)
M2 is an experimental rule of this test network. From a height set in its build, a node that enforces M2 accepts a block only if, besides the classical signet signature, the block carries a valid ML-DSA-44 signature by the Ark-0 block key, in its coinbase's witness commitment output. This page shows that signature; it does not check it.
Block 21639 is at or above the activation height 20000: nodes that enforce M2 accept a block there only with a valid ML-DSA-44 block signature.
The node behind this site enforces M2 and holds this block, so its block signature passed the node's check.
- Status
- In the form M2 requires, followed by the signet solution push (the classical signature)
- Signature
2e7072e02890fda101f015f32ce627d5…(2420 B)- Format version
0x01- Context string
SIGNET/PQBLOCK/EXP0- Block key the nodes require
- SHA-256
eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad
Transactions
| txid | Inputs | Outputs | Amount | Fee |
|---|---|---|---|---|
| 944c7d80efec…52263b6034de coinbase | 1 | 2 | 50 |