Prime factor of 300 000 000 000?

Question

I need to find out the prime factors of over 300 billion. I have a function that is adding to the list of them...very slowly! It has been running for about an hour now and i

Answer 1

Semi-prime numbers of that size are used for encryption, so I am curious as to what you exactly want to use them for.

That aside, there currently are not good ways to find the prime factorization of large numbers in a relatively small amount of time.