What is the prime factorization of -115?

Well the prim factorization of a number is just all the prime numbers you need to get that number, so to get the prime factorization of -115 you have to start with -1 x 115, and I'll just continue this through sort of a factor pyramid
-1 x 115
-1 x 5 x 23

Those are all the prime numbers you need, really