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?
I'm not familiar with ethereum very well, but what format is this private key? In bitcoin for example bruteforcing a key written in WIF would be harder than the original hex used to generate it.
Also like arulbero mentioned, you need to know the address you're looking for, because if for example, you only know if you have the right key once the balance of your target is not zero, your search becomes a LOT slower.