Found with PFGW Version 3.7.5

2124^8683-8683^2124 is 2-PRP! (15.4225s+0.0011s)
2124^8683-8683^2124 is 3-PRP! (15.1616s+0.0011s)
2124^8683-8683^2124 is 5-PRP! (15.2778s+0.0010s)
2124^8683-8683^2124 is 7-PRP! (15.2843s+0.0011s)
2124^8683-8683^2124 is 11-PRP! (15.2723s+0.0011s)

Primality testing 2124^8683-8683^2124 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 5
Running N+1 test using discriminant 11, base 3+sqrt(11)
Calling N-1 BLS with factored part 0.05% and helper 0.02% (0.18% proof)
2124^8683-8683^2124 is Fermat and Lucas PRP! (75.8582s+0.0022s)

To be completed...