Akito did you modified the FixedPaul's code to specifically search in 71bit range and another thing i want to ask is, like nodemath code he is searching for prefix f6f543, if someone is able to find multiple of these prefixes in the range, will it help in any way to reach the target faster?
You don’t need to modify the code, just use '-range 70'.
As for prefix, the answer is no, there’s no way to find the target in a "faster" way, but this has already been discussed and I don’t want to start a new argument. Someone here, however, will tell you that it is possible