Primality testing 26289^33178-33178^26289 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N+1 test using discriminant 7, base 1+sqrt(7)
Calling N-1 BLS with factored part 0.01% and helper 0.00% (0.03% proof)
26289^33178-33178^26289 is Fermat and Lucas PRP! (1513.4351s+0.0041s)

Sieved with xyyxsieve

To be completed...