1st PRP for 2^n-200677.

Sieved to P=200G.

Primality testing 2^76723-200677 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 167
Running N-1 test using base 197
Running N+1 test using discriminant 179, base 4+sqrt(179)
Calling N-1 BLS with factored part 0.01% and helper 0.01% (0.04% proof)
2^76723-200677 is Fermat and Lucas PRP! (463.9946s+0.0057s)

To be completed...