Primality testing 28986^30857-30857^28986 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 5
Running N+1 test using discriminant 11, base 2+sqrt(11)
Calling N+1 BLS with factored part 0.01% and helper 0.00% (0.04% proof)
28986^30857-30857^28986 is Fermat and Lucas PRP! (592.7558s+0.0023s)

Sieved with xyyxsieve

To be completed...