Primality testing 262^23247-23247^262 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N+1 test using discriminant 13, base 2+sqrt(13)
Calling N+1 BLS with factored part 0.02% and helper 0.01% (0.06% proof)
262^23247-23247^262 is Fermat and Lucas PRP! (101.1956s+0.0010s)

Sieved with xyyxsieve

To be completed...