Found with PFGW Version 3.6.0

212^4431-4431^212 is 2-PRP! (4.8356s+0.0016s)
212^4431-4431^212 is 3-PRP! (4.8216s+0.0015s)
212^4431-4431^212 is 5-PRP! (4.7956s+0.0016s)
212^4431-4431^212 is 7-PRP! (4.7911s+0.0019s)
212^4431-4431^212 is 11-PRP! (4.8114s+0.0016s)

Primality testing 212^4431-4431^212 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 5
Running N+1 test using discriminant 17, base 1+sqrt(17)
Calling N-1 BLS with factored part 0.12% and helper 0.10% (0.47% proof)
212^4431-4431^212 is Fermat and Lucas PRP! (22.8409s+0.0018s)

To be completed...