Found with PFGW Version 3.6.0

523^4230-4230^523 is 2-PRP! (5.7808s+0.0028s)
523^4230-4230^523 is 3-PRP! (5.8085s+0.0018s)
523^4230-4230^523 is 5-PRP! (5.7521s+0.0017s)
523^4230-4230^523 is 7-PRP! (5.7514s+0.0030s)
523^4230-4230^523 is 11-PRP! (5.7245s+0.0018s)

Primality testing 523^4230-4230^523 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 7
Running N-1 test using base 13
Running N+1 test using discriminant 19, base 6+sqrt(19)
Calling N+1 BLS with factored part 0.09% and helper 0.06% (0.34% proof)
523^4230-4230^523 is Fermat and Lucas PRP! (38.0463s+0.0018s)

To be completed...