Found with PFGW Version 3.6.0

12^23483-11 is 2-PRP! (7.3257s+0.0018s)
12^23483-11 is 3-PRP! (7.4485s+0.0018s)
12^23483-11 is 5-PRP! (7.2250s+0.0018s)
12^23483-11 is 7-PRP! (7.2929s+0.0020s)
12^23483-11 is 11-PRP! (7.2657s+0.0017s)

Primality testing 12^23483-11 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 2
Running N+1 test using discriminant 5, base 5+sqrt(5)
Calling N-1 BLS with factored part 0.10% and helper 0.02% (0.31% proof)
12^23483-11 is Fermat and Lucas PRP! (54.6020s+0.0054s)

To be completed...