PFGW Version 3.3.6.20100908.Win_Stable [GWNUM 25.14]
Primality testing 7*10^17971+87 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N+1 test using discriminant 11, base 2+sqrt(11)
7*10^17971+87 is Fermat and Lucas PRP! (42.4607s+0.0010s)

To be completed...