Primality testing 3008^19439-19439^3008 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N+1 test using discriminant 13, base 2+sqrt(13)
Calling N+1 BLS with factored part 0.01% and helper 0.00% (0.04% proof)
3008^19439-19439^3008 is Fermat and Lucas PRP! (194.6709s+0.0012s)

Sieved with xyyxsieve

To be completed...