Primality testing 27458^28145-28145^27458 [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 0.01% and helper 0.00% (0.02% proof)
27458^28145-28145^27458 is Fermat and Lucas PRP! (566.4612s+0.0023s)

Sieved with xyyxsieve

To be completed...