PFGW Version 4.1.3.64BIT.20240114.x86_Dev [GWNUM 30.19]
Primality testing (21^242194)%(10^242194) [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 13
Running N+1 test using discriminant 23, base 6+sqrt(23)
(21^242194)%(10^242194) is Fermat and Lucas PRP! (4013.0489s+0.0137s)

To be completed...