Sepolia · Frontier

128-bit secp256k1-shaped

Find the secret scalar d with d·G = Q. Exactly what recovering a private key from its public key means.

Open
Prize
Record level, no prize
Estimated cost
$7.3×10⁶ on CPU2⁶²·⁵ work, estimated, not benchmarked
Opened
Oct 19, 2026 · 2 h ago
Expires
Oct 18, 2028
Commitments
0

The instance

Derived from the hash of block 11,947,420. Anyone can recompute every value below from the spec and the chain.

Level id
0x272a78972c1e75137149c0c1bb292c52eb37c98ee1df68024f056fddbd275284
Seed
0x0c0d6beaaea9691ae86a3b8987f160e7b90b87e0e12a9970a97fb91e4eaed87d
Curve
y² = x³ + 7
p
170141183460469231731687303715884106231
n (order of G)
170141183460469231757681811340322366803
G
(113339209596365358633120865382769043135, 58425812549503339260603545036182704410)
Q
(93211956214457748879300882149413630802, 1674813151510918347860006996647611388)
Contract
0x5D6322…C48277

Solve

Find d. Small levels can be solved right here; big ones need a GPU. How solving works

Solve in your browser

Too big for a browser.

This curve's numbers are wider than 64 bits, beyond the in-browser solver. The cost model puts it at 2⁶²·⁵ steps even with every known shortcut. Levels this size need a GPU solver of your own. The instance above and the spec are everything it needs.

How big levels are solved

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.