Primality testing 27191^30560-30560^27191 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N+1 test using discriminant 7, base 1+sqrt(7)
Calling N-1 BLS with factored part 0.00% and helper 0.00% (0.01% proof)
27191^30560-30560^27191 is Fermat and Lucas PRP! (717.9021s+0.0024s)

Sieved with xyyxsieve

To be completed...