Found with PFGW Version 3.6.0

1260^4241-4241^1260 is 2-PRP! (6.7309s+0.0021s)
1260^4241-4241^1260 is 3-PRP! (6.6502s+0.0004s)
1260^4241-4241^1260 is 5-PRP! (6.6302s+0.0004s)
1260^4241-4241^1260 is 7-PRP! (6.6285s+0.0004s)
1260^4241-4241^1260 is 11-PRP! (6.6421s+0.0015s)

Primality testing 1260^4241-4241^1260 [N-1/N+1, Brillhart-Lehmer-Selfridge]
Running N-1 test using base 11
Running N+1 test using discriminant 17, base 1+sqrt(17)
Calling N+1 BLS with factored part 0.07% and helper 0.04% (0.25% proof)
1260^4241-4241^1260 is Fermat and Lucas PRP! (36.2316s+0.0018s)

To be completed...