PFGW Version 3.3.6.20100908.Win_Stable [GWNUM 25.14]
Primality testing 6*10^21843+91 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 2
Running N-1 test using base 3
Running N-1 test using base 7
Running N+1 test using discriminant 13, base 2+sqrt(13)
6*10^21843+91 is Fermat and Lucas PRP! (65.5654s+0.0010s)

To be completed...