Found with PFGW Version 3.6.0

2021^4550-4550^2021 is 2-PRP! (10.2585s+0.0019s)
2021^4550-4550^2021 is 3-PRP! (10.1671s+0.0020s)
2021^4550-4550^2021 is 5-PRP! (10.0977s+0.0036s)
2021^4550-4550^2021 is 7-PRP! (10.0856s+0.0035s)
2021^4550-4550^2021 is 11-PRP! (10.1266s+0.0035s)

Primality testing 2021^4550-4550^2021 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N+1 test using discriminant 17, base 6+sqrt(17)
Calling N+1 BLS with factored part 0.03% and helper 0.02% (0.10% proof)
2021^4550-4550^2021 is Fermat and Lucas PRP! (47.9916s+0.0033s)

To be completed...