Found with PFGW Version 3.7.5

1387^9980-9980^1387 is 2-PRP! (17.5780s+0.0012s)
1387^9980-9980^1387 is 3-PRP! (17.5677s+0.0012s)
1387^9980-9980^1387 is 5-PRP! (17.5952s+0.0012s)
1387^9980-9980^1387 is 7-PRP! (17.5839s+0.0014s)
1387^9980-9980^1387 is 11-PRP! (17.5788s+0.0012s)

Primality testing 1387^9980-9980^1387 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N+1 test using discriminant 7, base 1+sqrt(7)
Calling N-1 BLS with factored part 0.03% and helper 0.00% (0.11% proof)
1387^9980-9980^1387 is Fermat and Lucas PRP! (102.6013s+0.0020s)

To be completed...