Found with PFGW Version 3.6.0

1519^4380-4380^1519 is 2-PRP! (9.1897s+0.0022s)
1519^4380-4380^1519 is 3-PRP! (9.3023s+0.0006s)
1519^4380-4380^1519 is 5-PRP! (9.3370s+0.0005s)
1519^4380-4380^1519 is 7-PRP! (9.3069s+0.0006s)
1519^4380-4380^1519 is 11-PRP! (9.3293s+0.0006s)

Primality testing 1519^4380-4380^1519 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 11
Running N+1 test using discriminant 23, base 1+sqrt(23)
Calling N-1 BLS with factored part 0.06% and helper 0.04% (0.22% proof)
1519^4380-4380^1519 is Fermat and Lucas PRP! (44.5784s+0.0032s)

To be completed...