Sepolia · Record

40-bit target 24 rounds

Find an input whose Keccak hash, bound to your address, matches the target in its first bits.

Open
Prize
Record level, no prize
Estimated cost
under $1 on CPU2⁴⁰ work, estimated, not benchmarked
Opened
Oct 19, 2026 · 2 h ago
Expires
Oct 16, 2036
Commitments
0

The instance

Derived from the hash of block 11,947,694. Anyone can recompute every value below from the spec and the chain.

Level id
0x463cb0ba9de9c03d432b8b084df97bfb9e5039f5f7d73022f02a64447471be18
Seed
0x8b5124a5d903a687a37d022900ffc601aca118fc2488dbf6a07ccd9da47b545c
Function
Keccak[r=1440, c=160], 24 rounds, 80-bit output
Target bits t
40
Target T
0x4a276eed00fce54dd60b
Contract
0x5D6322…C48277

Claim

Solved it? Check the answer here, then commit and reveal. The reference solver and the spec are in the method notes. How to solve

  1. 1

    Connect a wallet

    No browser wallet found. Any EIP-1193 wallet works, on Sepolia.

  2. 2

    Check your solution

    Checked in your browser against the live instance. Nothing is sent until you commit.

  3. 3

    Commit

    Publishes a fingerprint of your solution bound to your payout address. Nobody can read the solution from it, and copying it would still pay you.

  4. 4

    Reveal, then get paid

    Reveal once your commitment is 3 blocks old. The earliest commitment with a valid reveal is paid after a …-minute settlement window.

Your salt is kept in this browser and in the receipt file. Without it a commitment cannot be revealed. Every claim from this browser is listed under My claims.

History

Every event for this level, from the contract.