Found with PFGW Version 3.8.0

2491^13472-13472^2491 is 2-PRP! (40.2329s+0.0102s)
2491^13472-13472^2491 is 3-PRP! (40.0735s+0.0094s)
2491^13472-13472^2491 is 5-PRP! (38.0296s+0.0254s)
2491^13472-13472^2491 is 7-PRP! (40.8448s+0.0093s)
2491^13472-13472^2491 is 11-PRP! (39.8996s+0.0106s)

Primality testing 2491^13472-13472^2491 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N+1 test using discriminant 11, base 1+sqrt(11)
Calling N-1 BLS with factored part 0.04% and helper 0.02% (0.13% proof)
2491^13472-13472^2491 is Fermat and Lucas PRP! (203.8803s+0.0231s)

To be completed...