Primality testing 28714^30921-30921^28714 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N+1 test using discriminant 11, base 2+sqrt(11)
Calling N-1 BLS with factored part 0.00% and helper 0.00% (0.01% proof)
28714^30921-30921^28714 is Fermat and Lucas PRP! (600.9460s+0.0025s)

Sieved with xyyxsieve

To be completed...