Primality testing 26733^28628-28628^26733 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 5
Running N+1 test using discriminant 29, base 3+sqrt(29)
Calling N-1 BLS with factored part 0.00% and helper 0.00% (0.01% proof)
26733^28628-28628^26733 is Fermat and Lucas PRP! (575.4102s+0.0023s)

Sieved with xyyxsieve

To be completed...