1st PRP for 2^n-504883.

Sieved to P=200G.

Primality testing 2^103073-504883 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 23
Running N+1 test using discriminant 31, base 1+sqrt(31)
Calling N-1 BLS with factored part 0.04% and helper 0.02% (0.14% proof)
2^103073-504883 is Fermat and Lucas PRP! (493.4146s+0.0055s)

To be completed...