Primality testing 27902^29237-29237^27902 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N+1 test using discriminant 17, base 1+sqrt(17)
Calling N-1 BLS with factored part 0.01% and helper 0.00% (0.02% proof)
27902^29237-29237^27902 is Fermat and Lucas PRP! (646.0504s+0.0023s)

Sieved with xyyxsieve

To be completed...