Primality testing 227^22428-22428^227 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 11
Running N+1 test using discriminant 17, base 2+sqrt(17)
Calling N-1 BLS with factored part 0.01% and helper 0.00% (0.03% proof)
227^22428-22428^227 is Fermat and Lucas PRP! (80.3321s+0.0015s)

Sieved with xyyxsieve

To be completed...