just type in the number you want the prime factors of and for large numbers (greater than 100) turn on quick load.
quick load is the only option as of now what it does is is remove an the loading animation to use less cpu it only really helps if you are trying for a big number. what this is, is a fast prime factorization algorithm so you dont have to google and search through search results to find the right thing. it will work with any number greater than 1.