Found with PFGW Version 3.8.0

4221^13054-13054^4221 is 2-PRP! (42.0960s+0.0091s)
4221^13054-13054^4221 is 3-PRP! (43.5848s+0.0055s)
4221^13054-13054^4221 is 5-PRP! (42.0979s+0.0099s)
4221^13054-13054^4221 is 7-PRP! (43.0540s+0.0090s)
4221^13054-13054^4221 is 11-PRP! (42.1564s+0.0088s)

Primality testing 4221^13054-13054^4221 [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 0.02% and helper 0.01% (0.08% proof)
4221^13054-13054^4221 is Fermat and Lucas PRP! (242.1042s+0.0092s)

To be completed...