Primality testing 29487^31690-31690^29487 [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 0.01% and helper 0.00% (0.04% proof)
29487^31690-31690^29487 is Fermat and Lucas PRP! (681.9499s+0.0026s)

Sieved with xyyxsieve

To be completed...