Hi George,
I got a segmentation fault on running the mprime version you posted. The following is the size of the binary :2326620 and the timestamp: Aug 13 16:14 (Timezone +2 GMT).

The worktodo consisted of only one line:
Pfactor=21181,2,6799052,1,48,0

This works on Windows but on linux this is what I get:

Mersenne number primality test program version HE-2
Starting P-1 factoring with B1=50000, B2=575000
Chance of finding a factor is an estimated 1.26%
P-1 on 21181*2^6799052+1 with B1=50000, B2=575000
Using FFT length 768K
Segmentation fault

I know you are probably busy with the cleanup so take your time fixing it.