Primality testing 28831^29388-29388^28831 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 7
Running N-1 test using base 19
Running N-1 test using base 23
Running N+1 test using discriminant 41, base 8+sqrt(41)
Calling N-1 BLS with factored part 0.01% and helper 0.00% (0.03% proof)
28831^29388-29388^28831 is Fermat and Lucas PRP! (845.2529s+0.0022s)

Sieved with xyyxsieve

To be completed...