Found with PFGW Version 3.7.5

208^5595-5595^208 is 2-PRP! (5.8290s+0.0015s)
208^5595-5595^208 is 3-PRP! (6.1348s+0.0013s)
208^5595-5595^208 is 5-PRP! (6.3276s+0.0014s)
208^5595-5595^208 is 7-PRP! (5.9730s+0.0013s)
208^5595-5595^208 is 11-PRP! (6.3245s+0.0012s)

Primality testing 208^5595-5595^208 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N+1 test using discriminant 7, base 6+sqrt(7)
Calling N+1 BLS with factored part 0.10% and helper 0.06% (0.38% proof)
208^5595-5595^208 is Fermat and Lucas PRP! (37.3302s+0.0029s)

To be completed...