Primality testing 29937^33400-33400^29937 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N-1 test using base 7
Running N+1 test using discriminant 13, base 1+sqrt(13)
Calling N-1 BLS with factored part 0.01% and helper 0.00% (0.02% proof)
29937^33400-33400^29937 is Fermat and Lucas PRP! (1324.9749s+0.0034s)

Sieved with xyyxsieve

To be completed...