Primality testing 25237^34458-34458^25237 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 11
Running N+1 test using discriminant 17, base 2+sqrt(17)
Calling N-1 BLS with factored part 0.01% and helper 0.00% (0.04% proof)
25237^34458-34458^25237 is Fermat and Lucas PRP! (2581.1127s+0.0035s)

Sieved with xyyxsieve

To be completed...