Primality testing 72^36313-36313^72 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 7
Running N-1 test using base 11
Running N+1 test using discriminant 17, base 1+sqrt(17)
Calling N+1 BLS with factored part 0.01% and helper 0.01% (0.05% proof)
72^36313-36313^72 is Fermat and Lucas PRP! (199.6521s+0.0009s)

Sieved with xyyxsieve

To be completed...