Found with PFGW Version 3.7.5

2550^9559-9559^2550 is 2-PRP! (18.3675s+0.0013s)
2550^9559-9559^2550 is 3-PRP! (18.2290s+0.0012s)
2550^9559-9559^2550 is 5-PRP! (18.7420s+0.0014s)
2550^9559-9559^2550 is 7-PRP! (18.1985s+0.0013s)
2550^9559-9559^2550 is 11-PRP! (18.2975s+0.0013s)

Primality testing 2550^9559-9559^2550 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 7
Running N+1 test using discriminant 41, base 1+sqrt(41)
Calling N+1 BLS with factored part 0.02% and helper 0.00% (0.06% proof)
2550^9559-9559^2550 is Fermat and Lucas PRP! (105.8090s+0.0025s)

To be completed...