Found with PFGW Version 3.7.5

212^6439-6439^212 is 2-PRP! (9.7433s+0.0017s)
212^6439-6439^212 is 3-PRP! (7.4542s+0.0017s)
212^6439-6439^212 is 5-PRP! (7.9380s+0.0015s)
212^6439-6439^212 is 7-PRP! (9.2535s+0.0039s)
212^6439-6439^212 is 11-PRP! (7.6538s+0.0018s)

Primality testing 212^6439-6439^212 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 3
Running N-1 test using base 5
Running N-1 test using base 7
Running N+1 test using discriminant 17, base 1+sqrt(17)
Calling N+1 BLS with factored part 0.09% and helper 0.05% (0.33% proof)
212^6439-6439^212 is Fermat and Lucas PRP! (52.2034s+0.0030s)

To be completed...