Sepolia · Record

76-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
$5.9×10¹⁰ on CPU2⁷⁶ work, estimated, not benchmarked
Opened
Oct 19, 2026 · 59 min ago
Expires
Oct 16, 2036
Commitments
0

The instance

Derived from the hash of block 11,947,796. Anyone can recompute every value below from the spec and the chain.

Level id
0xf44a0c42fafe7a364ae47189b5c3c949d5de14363534f31729dada1a4c04d7b3
Seed
0x28229c6c7489f849ac44ea3ab16bf9983922002ec55ce3cd63c6dcb59142d2ca
Function
Keccak[r=1440, c=160], 24 rounds, 80-bit output
Target bits t
76
Target T
0xc29bd98afb37a353f347
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.