Private keys are 256 bit numbers. I know the max. possible number is something around: 115792089237316195423570985008687907852837564279074904382605163141518161494336

What about the min. number possible?


2 Answers 2


The all-zero bitstring doesn't have a corresponding public key per the standard (according to "Are all possible EC private keys valid?" on Crypto.SE), so it's 000…001.


One is the minimum number. [This space intentionally left unblank.]

  • 11
    "♫ One... is... the minimum number for a private key... ♫" Commented Sep 21, 2018 at 21:12
  • If only I'd thought of that to get around the minimum answer length. :)
    – G. Maxwell
    Commented Sep 22, 2018 at 2:18

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.