Primality testing 31198^36027-36027^31198 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N-1 test using base 5
Running N+1 test using discriminant 11, base 3+sqrt(11)
Calling N-1 BLS with factored part 0.01% and helper 0.00% (0.02% proof)
31198^36027-36027^31198 is Fermat and Lucas PRP! (2173.0987s+0.0027s)

Sieved with xyyxsieve

To be completed...