Found with PFGW Version 3.7.5

663^9370-9370^663 is 2-PRP! (13.5783s+0.0010s)
663^9370-9370^663 is 3-PRP! (13.6063s+0.0012s)
663^9370-9370^663 is 5-PRP! (13.5000s+0.0012s)
663^9370-9370^663 is 7-PRP! (13.5020s+0.0012s)
663^9370-9370^663 is 11-PRP! (13.5739s+0.0012s)

Primality testing 663^9370-9370^663 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N+1 test using discriminant 17, base 8+sqrt(17)
Calling N+1 BLS with factored part 0.07% and helper 0.02% (0.23% proof)
663^9370-9370^663 is Fermat and Lucas PRP! (66.8819s+0.0020s)

To be completed...