zden/level-5

Solved on 2026-09-22 after 7y 11mo 8d 23h 47m, key published. 0.0055555 BTC on Bitcoin.

IDzden/level-505 / 162018-10-20 → 2026-09-22

Puzzle / zden

level-5

bitcoinp2pkh solved

Record

puzzle({
  chain: "bitcoin",
  address: "1cryptoGeCRi…VydN1GW7",
  status: Status.Solved,
  key: hex("f4bfad681985…ce8a9f51").wif("5Kg5Mosdn8db…JNqtBBCG"),
})

Prize: 0.0055555 BTC
Key material: hex
Verification: verified
Solved: 2026-09-22 · 7y 11mo 8d 23h 47m

tx 5

Trail: Explorerblockstream.info; Sourcecrypto.haluska.sk/crypto5fix.png; Solverecho.ls and what else they solved; Tryzden/level-5 in the playground

Address: 1cryptoGeCRiTzVgxBQcKFFjSVydN1GW7

hash160 06c84797d2441393513e2169338e00cf2e755c8c

Balance

asking the explorer

Key

public key · uncompressed: 0488d3d2481ceee8be4372fc4d1ef8451e5b5e1c092728566f5b1bd1a5849ffa870681b60b5e97983e4d027156273b3f81da778005e1104cf3fbc9446e66ccbb9a
private key (hex): f4bfad68198549d3e5612fa3b1cabad14679c634359e2f5efdd804ddce8a9f51
WIF: 5Kg5Mosdn8dbSCsNBVtFHTVMjyfSE8UR2nfLLG8JcjWJNqtBBCG

Transactions

funding2018-10-200.00260414 BTC3dde5372e5…518c38
increase2018-11-080.00088248 BTC2a3e02a4a0…a27df4
increase2021-02-140.00001338 BTC9b4c2a2aac…64f884
increase2021-12-030.0020555 BTC33d0b16e4f…a944a1
claim2026-09-220.00551745 BTCe254443318…5e8e8e

Files

Fromcrypto.haluska.sk/crypto5fix.png

Techniques

steganographycollectioncrypto.haluska.sk

Hints

2018-12-2410:19:06
officialSum of two consecutive following rectangles areas creates one byte of the private key. Apply more operations to obtain the results in byte range.
Sourcetwitter.com/Zd3N/status/1077146640090316800Confirmweb.archive.org
undated
officialThe new corrected version including new hints! UNSOLVED for over 3 years because the original release was uncomplete! Relaunched on 12th of December 2021. My excuses to everyone!
Sourcecrypto.haluska.skConfirmweb.archive.org
undated
official(clarity edit: sum of two ~~consecutive~~ following rectangles...)
Sourcecrypto.haluska.skConfirmweb.archive.org