Found with PFGW Version 3.6.0

1709^12750+12750^1709 is 2-PRP! (83.8809s+0.0052s)
1709^12750+12750^1709 is 3-PRP! (83.5723s+0.0031s)
1709^12750+12750^1709 is 5-PRP! (83.6378s+0.0031s)
1709^12750+12750^1709 is 7-PRP! (83.9302s+0.0053s)
1709^12750+12750^1709 is 11-PRP! (83.5559s+0.0032s)

Primality testing 1709^12750+12750^1709 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 7
Running N+1 test using discriminant 19, base 15+sqrt(19)
Calling N-1 BLS with factored part 0.03% and helper 0.01% (0.09% proof)
1709^12750+12750^1709 is Fermat and Lucas PRP! (394.7294s+0.0053s)

To be completed...