Primality testing 26220^29021-29021^26220 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 7
Running N+1 test using discriminant 13, base 1+sqrt(13)
Calling N-1 BLS with factored part 0.01% and helper 0.01% (0.04% proof)
26220^29021-29021^26220 is Fermat and Lucas PRP! (1320.2168s+0.0037s)

Sieved with xyyxsieve

To be completed...