Primality testing 26987^29988-29988^26987 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 11
Running N+1 test using discriminant 19, base 9+sqrt(19)
Calling N-1 BLS with factored part 0.01% and helper 0.00% (0.02% proof)
26987^29988-29988^26987 is Fermat and Lucas PRP! (603.4334s+0.0023s)

Sieved with xyyxsieve

To be completed...