Found with PFGW Version 3.7.5

2145^6904-6904^2145 is 2-PRP! (17.0608s+0.0026s)
2145^6904-6904^2145 is 3-PRP! (20.1858s+0.0021s)
2145^6904-6904^2145 is 5-PRP! (18.3686s+0.0021s)
2145^6904-6904^2145 is 7-PRP! (17.9907s+0.0021s)
2145^6904-6904^2145 is 11-PRP! (19.7391s+0.0027s)

Primality testing 2145^6904-6904^2145 [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 0.07% and helper 0.05% (0.26% proof)
2145^6904-6904^2145 is Fermat and Lucas PRP! (91.5050s+0.0053s)

To be completed...