Found with PFGW Version 3.8.0

920^13221-13221^920 is 2-PRP! (33.1375s+0.0038s)
920^13221-13221^920 is 3-PRP! (32.6495s+0.0040s)
920^13221-13221^920 is 5-PRP! (32.6163s+0.0040s)
920^13221-13221^920 is 7-PRP! (32.6181s+0.0042s)
920^13221-13221^920 is 11-PRP! (32.6220s+0.0043s)

Primality testing 920^13221-13221^920 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 7
Running N+1 test using discriminant 19, base 1+sqrt(19)
Calling N-1 BLS with factored part 0.02% and helper 0.02% (0.09% proof)
920^13221-13221^920 is Fermat and Lucas PRP! (161.2663s+0.0144s)

To be completed...