Block 21640
- Hash
000000c755ba8aef38e12079ea28b11ee9cd74fda53c5b0e6efbfe5d6df24115- Confirmations
- 20482
- Time
- 2026-10-13 02:13:48 UTC
- Median time
- 2026-10-13 02:05:57 UTC
- Transactions
- 1
- Size
- 2,772
- Weight
- 10,980
- Difficulty
- 0.0031405554
- Bits
1e013e69- Merkle root
45ad56e25e34ad95fe390e3c86323e7a774dd08c33436dc6969962332fb1c27c- Previous block
- 0000001cb58bf52a427fd5aaaef11d8a6b90d50526bbe4fa94cf7114bcb41655
- Next block
- 0000001f5b6b686059dbb7390df1bda22b71e07683f92f88b920ac390a49ec1b
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 21640 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
b76e56372b2b354c5f5e19568fd4dcfa…(2420 B)- Format version
0x01- Context string
SIGNET/PQBLOCK/EXP0- Block key the nodes require
- SHA-256
eee8548f51f25492de3ae430b7ce7ec549edfaa663b8f577f026ce0498fdd6ad
Transactions
| txid | Inputs | Outputs | Amount | Fee |
|---|---|---|---|---|
| 45ad56e25e34…62332fb1c27c coinbase | 1 | 2 | 50 |