INVESTIGATIVE DOSSIER · RESEARCHED 03 OCT 2026
BITCOIN PUZZLE #102 · 102-BIT · OPEN

Bitcoin Puzzle #102

Still unsolved. The private key for this puzzle is an integer between 2^101 and 2^102 − 1, and whoever finds it can sweep 10.20000000 BTC from 1PXv28YxmYMaB8zxrKeZBW8dt2HK7RkRPX.

How to attempt Bitcoin puzzle #102

Only the address is known, so a solver has to walk the interval: multiply the secp256k1 generator by each candidate key, hash the compressed public key with SHA-256 and RIPEMD-160, and compare with the address’s hash160. On average that is 2^100 tests, about 1.27e+30. A single high-end GPU running BitCrack or keyhunt manages roughly a billion tests per second.

Try cracking #102 in your browser How solvers really attack it