1st prime for 4^n+43281

Sieved to P=10G

Primality testing 2^37516+43281 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 5
Running N+1 test using discriminant 13, base 13+sqrt(13)
Calling N+1 BLS with factored part 0.08% and helper 0.08% (0.33% proof)
2^37516+43281 is Fermat and Lucas PRP! (53.5436s+0.0041s)

To be completed...