Found with PFGW Version 3.8.0

12240^12709-12709^12240 is 2-PRP! (48.1198s+0.0055s)
12240^12709-12709^12240 is 3-PRP! (47.9055s+0.0052s)
12240^12709-12709^12240 is 5-PRP! (48.2949s+0.0057s)
12240^12709-12709^12240 is 7-PRP! (48.0161s+0.0055s)
12240^12709-12709^12240 is 11-PRP! (48.0091s+0.0055s)

Primality testing 12240^12709-12709^12240 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 13
Running N+1 test using discriminant 23, base 1+sqrt(23)
Calling N+1 BLS with factored part 0.05% and helper 0.00% (0.15% proof)
12240^12709-12709^12240 is Fermat and Lucas PRP! (278.3164s+0.0054s)

To be completed...