Primality testing 31527^35108-35108^31527 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 11
Running N-1 test using base 17
Running N-1 test using base 29
Running N-1 test using base 31
Running N+1 test using discriminant 41, base 2+sqrt(41)
Calling N+1 BLS with factored part 0.00% and helper 0.00% (0.01% proof)
31527^35108-35108^31527 is Fermat and Lucas PRP! (1734.1799s+0.0040s)

Sieved with xyyxsieve

To be completed...