Does anyone see a need to keep the -j option around in pfgw?
I'm asking because pfgw executes the same gwnum routines as if testing -q2^<exp>-1. There are some exceptions. One is that pfgw is not logging the test result when using -j. The other is that -j triggers special factorization code. Instead of modifying the -j code to do the exact same thing a PRP test would do, I would prefer to remove support for -j. Besides, -j covers the Mersenne numbers, which are already tested via Prime95 and GIMPS.