Found with PFGW Version 3.8.0

1784^11221-11221^1784 is 2-PRP! (23.2441s+0.0032s)
1784^11221-11221^1784 is 3-PRP! (23.9140s+0.0037s)
1784^11221-11221^1784 is 5-PRP! (24.3343s+0.0037s)
1784^11221-11221^1784 is 7-PRP! (23.9598s+0.0035s)
1784^11221-11221^1784 is 11-PRP! (23.8577s+0.0039s)

Primality testing 1784^11221-11221^1784 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N-1 test using base 5
Running N-1 test using base 11
Running N+1 test using discriminant 19, base 1+sqrt(19)
Calling N-1 BLS with factored part 0.04% and helper 0.03% (0.16% proof)
1784^11221-11221^1784 is Fermat and Lucas PRP! (169.3554s+0.0060s)

To be completed...