Found with PFGW Version 3.7.5

1457^6950-6950^1457 is 2-PRP! (16.0258s+0.0026s)
1457^6950-6950^1457 is 3-PRP! (17.7084s+0.0028s)
1457^6950-6950^1457 is 5-PRP! (16.8527s+0.0022s)
1457^6950-6950^1457 is 7-PRP! (18.2261s+0.0023s)
1457^6950-6950^1457 is 11-PRP! (17.0847s+0.0030s)

Primality testing 1457^6950-6950^1457 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N+1 test using discriminant 11, base 7+sqrt(11)
Calling N+1 BLS with factored part 0.06% and helper 0.05% (0.24% proof)
1457^6950-6950^1457 is Fermat and Lucas PRP! (91.9776s+0.0020s)

To be completed...