Found with PFGW Version 3.6.0

830^4021-4021^830 is 2-PRP! (6.1557s+0.0032s)
830^4021-4021^830 is 3-PRP! (6.1500s+0.0043s)
830^4021-4021^830 is 5-PRP! (6.1612s+0.0033s)
830^4021-4021^830 is 7-PRP! (6.2091s+0.0068s)
830^4021-4021^830 is 11-PRP! (6.1342s+0.0043s)

Primality testing 830^4021-4021^830 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N-1 test using base 7
Running N+1 test using discriminant 13, base 2+sqrt(13)
Calling N-1 BLS with factored part 0.06% and helper 0.05% (0.23% proof)
830^4021-4021^830 is Fermat and Lucas PRP! (34.6360s+0.0019s)

To be completed...