1st PRP for 28^n-11831

Sieved to P=10G

Primality testing 28^9566-11831 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 5
Running N+1 test using discriminant 17, base 8+sqrt(17)
Running N+1 test using discriminant 17, base 10+sqrt(17)
Running N+1 test using discriminant 17, base 12+sqrt(17)
Calling N+1 BLS with factored part 0.08% and helper 0.04% (0.28% proof)
28^9566-11831 is Fermat and Lucas PRP! (444.5706s+0.0138s)

To be completed...