hashcash

Find a missing number string to make the SHA256 hash smol.

The number goes in between the prefix and the suffix (both of which can be empty). e.g. If prefix = "proto" and suffix = "gen"

then if the chosen number is "1024" the input to SHA256 becomes "proto1024gen". This will only test numbers up to 2^24. (around 16 million)

prefix =

suffix =

zeros (max 5/default 4) =

RESULT = ...

SHA256(...) = ...