Primality testing 26084^37871-37871^26084 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N-1 test using base 5
Running N-1 test using base 11
Running N+1 test using discriminant 17, base 1+sqrt(17)
Calling N+1 BLS with factored part 0.01% and helper 0.00% (0.02% proof)
26084^37871-37871^26084 is Fermat and Lucas PRP! (3173.6557s+0.0043s)

Sieved with xyyxsieve

To be completed...