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    Yes, I agree. The problem description is kind of confusing. It took me a while to figure out what the problem actually meant.

    Basically it is asking like: Find any numbers (up to 100) which have the maximum number of unique prime factors. For example of N=100, while 30=2*3*5 or 42=2*3*7 which consist of 3 prime numbers, while the smallest number which can have 4 prime facters is 2*3*5*7=210, which is over 100. So the answer is 3 comes from either 30 or 42.