Primality testing 31522^38883-38883^31522 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N-1 test using base 11
Running N+1 test using discriminant 17, base 1+sqrt(17)
Calling N-1 BLS with factored part 0.00% and helper 0.00% (0.02% proof)
31522^38883-38883^31522 is Fermat and Lucas PRP! (1468.4784s+0.0045s)

Sieved with xyyxsieve

To be completed...