IDcollectionsRetiredCoder's mini-puzzles
mini/4
Solved on 2025-01-15 after 15h 18m, key published. 0.01 BTC on Bitcoin.
4
bitcoinp2pkh solved
Record
bitcoinPuzzle({
address: p2pkh("1AH5pRZW4Zof…YNu3Rez7", "65c3cf1b54c1…b88b9970"),
status: Status.Solved,
key: hex("c6768f199574…e9301552"),
})- Prize
- 0.01 BTC
- Key material
- hex
- Verification
- verified
- Solved
- 2025-01-15 · 15h 18m
- Trail
- Explorerblockstream.info
- Sourcebitcointalk.org/index.php?topic=5526453
- Trymini/4 in the playground
- Address
- 1AH5pRZW4ZofEJhdb3muNZ1q88YNu3Rez7
hash160 65c3cf1b54c179e6a2fee4fa3a148ed9b88b9970
Key
- public key · compressed
- 03c8f139dad58b4786d3649992849733c2a7626f011089e87508ccdf8b0758c493
- private key (hex)
- c6768f199574104ae1b75eab82b0cc1d2d2e9ee7d50637a574e27131e9301552
Transactions
- funding2025-01-140.01 BTC5353b25012…76ae8c
- claim2025-01-150.01 BTC3df3a1c623…563007
Hints
- 2025-01-14
official03C8F139DAD58B4786D3649992849733C2A7626F011089E87508CCDF8B0758C493 Hint: It's a strong point so you cannot solve it by kangaroos. But it's a special point, you can solve it easily if you use some feature of secp256k1.
Sourcebitcointalk.org/index.php?topic=5526453.msg64953111
Published answer
Another explanation: It's a special point, if you apply endomorphism for it, you will get previous point (Point - G). It's funny to have two points next to each other with same Y, isn't it? And since you know the distance between these two points, you can calculate the private key easily.
2025-01-15bitcointalk.org/index.php?topic=5526453.msg64955287
- 2025-01-14
officialIt's not difficult, really. And you don't even need GPUs or fast PC.
- 2025-01-14
officialECDSA already was in previous puzzle, so probably I won't use it again