1st PRP for 2^n-409211.

Sieved to P=200G.

Primality testing 2^77766-409211 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 157
Running N+1 test using discriminant 179, base 1+sqrt(179)
Running N+1 test using discriminant 179, base 2+sqrt(179)
Calling N+1 BLS with factored part 0.02% and helper 0.01% (0.08% proof)
2^77766-409211 is Fermat and Lucas PRP! (708.3909s+0.0623s)

To be completed...