Found with PFGW Version 3.7.5

1572^9491-9491^1572 is 2-PRP! (15.5357s+0.0011s)
1572^9491-9491^1572 is 3-PRP! (15.8481s+0.0011s)
1572^9491-9491^1572 is 5-PRP! (15.9800s+0.0010s)
1572^9491-9491^1572 is 7-PRP! (15.8873s+0.0012s)
1572^9491-9491^1572 is 11-PRP! (15.9162s+0.0011s)

Primality testing 1572^9491-9491^1572 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 5
Running N+1 test using discriminant 13, base 1+sqrt(13)
Calling N+1 BLS with factored part 0.04% and helper 0.00% (0.12% proof)
1572^9491-9491^1572 is Fermat and Lucas PRP! (80.0754s+0.0023s)

To be completed...