1st PRP for 2^n-278489.

Sieved to P=200G.

Primality testing 2^135020-278489 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 19
Running N+1 test using discriminant 43, base 1+sqrt(43)
Calling N-1 BLS with factored part 0.03% and helper 0.01% (0.10% proof)
2^135020-278489 is Fermat and Lucas PRP! (2038.4040s+0.0077s)

To be completed...