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

What about the min. number possible?

Thanks.

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2 Answers 2

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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.

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

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

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