PFGW Version 20020515.Win_Dev (Beta software, 'caveat utilitor')
Primality testing 31^13639-30 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Reading factors from helper file 31.13639.help.txt
Running N-1 test using base 11
Running N-1 test using base 17
Running N+1 test using discriminant 23, base 1+sqrt(23)
Calling N-1 BLS with factored part 0.20% and helper 0.08% (0.69% proof)
31^13639-30 is Fermat and Lucas PRP! (863.375000 seconds)

To be completed...