Found with PFGW Version 3.6.0

715^6758-6758^715 is 2-PRP! (14.7472s+0.0021s)
715^6758-6758^715 is 3-PRP! (14.6606s+0.0041s)
715^6758-6758^715 is 5-PRP! (14.6891s+0.0021s)
715^6758-6758^715 is 7-PRP! (14.6805s+0.0021s)
715^6758-6758^715 is 11-PRP! (14.6900s+0.0031s)

Primality testing 715^6758-6758^715 [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 0.12% and helper 0.10% (0.47% proof)
715^6758-6758^715 is Fermat and Lucas PRP! (71.5559s+0.0039s)

To be completed...