OJ Board

Thank you SO much, that was my problem too. I was quitting when an empty line was detected. I switched that and it was accepted. Where does it say that empty lines are valid input, I do not recall reading that? Thanks again for all your help.

You can get the prime factors of the m and n (from two to n since it is n!) numbers and keep dividing out the prime factors from m until no more prime factors remain in m (return true) or until you reach n (return false).

I would not do it with BigInteger though because it seems the judge does not ...