Primality testing (2^(20306*3+1)+243)/7 [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 5
Running N+1 test using discriminant 19, base 1+sqrt(19)
(2^(20306*3+1)+243)/7 is Fermat and Lucas PRP! (39.0193s+0.0260s)

To be completed...