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