INVESTIGATIVE DOSSIER · RESEARCHED 03 OCT 2026
BITCOIN PUZZLE #17 · 17-BIT · SOLVED

Bitcoin Puzzle #17

Solved and swept on 15 Jan 2015. The private key for this 17-bit puzzle was found inside [2^16, 2^17) and the balance was moved out.

Why puzzle #17 still matters

A solved puzzle is a benchmark. Running a cracker against it should recover the real private key, which is how you tell genuine code from a toy. Puzzle #17 needs about 2^15 key tests on average, which the in-browser engine on this site finishes in seconds.

Re-solve #17 in your browser All 256 puzzle addresses