Found with PFGW Version 3.7.5

108^8988-107 is 2-PRP! (3.6501s+0.0018s)
108^8988-107 is 3-PRP! (3.7396s+0.0018s)
108^8988-107 is 5-PRP! (3.9814s+0.0022s)
108^8988-107 is 7-PRP! (3.7577s+0.0017s)
108^8988-107 is 11-PRP! (3.7782s+0.0022s)

Primality testing 108^8988-107 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 2
Running N+1 test using discriminant 7, base 1+sqrt(7)
Calling N-1 BLS with factored part 0.14% and helper 0.02% (0.43% proof)
108^8988-107 is Fermat and Lucas PRP! (27.7858s+0.0023s)

To be completed...