Found with PFGW Version 3.8.0

4809^13220-13220^4809 is 2-PRP! (44.0507s+0.0090s)
4809^13220-13220^4809 is 3-PRP! (43.9727s+0.0096s)
4809^13220-13220^4809 is 5-PRP! (43.2340s+0.0090s)
4809^13220-13220^4809 is 7-PRP! (43.2477s+0.0098s)
4809^13220-13220^4809 is 11-PRP! (43.3447s+0.0141s)

Primality testing 4809^13220-13220^4809 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 7
Running N+1 test using discriminant 13, base 8+sqrt(13)
Calling N+1 BLS with factored part 0.02% and helper 0.02% (0.09% proof)
4809^13220-13220^4809 is Fermat and Lucas PRP! (275.3123s+0.0128s)

To be completed...