1st PRP for 28^n-18677

Sieved to P=10G

Primality testing 28^9381-18677 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 19
Running N+1 test using discriminant 29, base 1+sqrt(29)
Running N+1 test using discriminant 29, base 2+sqrt(29)
Calling N+1 BLS with factored part 0.12% and helper 0.06% (0.42% proof)
28^9381-18677 is Fermat and Lucas PRP! (319.7563s+0.0099s)

To be completed...