hi i know displaying any parts of private key is dangerous ( Especially the first character ! )
is possible Brute-force attack ethereum private key missing a 20 character in the end ?! - What time is expected
i think it's possible and Easy Especially ethereum the range ( 0-9 , A-F ) The odds are lower
What do you think about that?
You have all of the private key except 20 characters (80 bits)? Then it is possible and feasible to recover the entire key using baby-step-giant-step or pollard's tho algorithm.
It will require 2^40 work, which is a few hours on a GPU.