PFGW Version 1.2.0 for Windows [FFT v23.8]

Primality testing 10^19734+393939
[N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 2
Running N+1 test using discriminant 7, base 1+sqrt(7)
10^19734+393939 is Fermat and Lucas PRP!

To be completed...