Primality testing 1622^18967-18967^1622 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
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% (0.05% proof)
1622^18967-18967^1622 is Fermat and Lucas PRP! (197.5482s+0.0020s)

Sieved with xyyxsieve

To be completed...