Because you can multiply 1 to other numbers.I'm correct?
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1 is not composite or prime.
Every positive integer greater than 1 is either prime or composite.
It is 1 that is neither a prime or a composite number The number 1 is neither prime nor composite.
That is how they are defined. Any number greater than 1 is composite if it has a factor other than 1 and itself. If it is not a composite number then it is a prime number. It mustbe one or the other and the result follows.
It is prime. By the way, any integer greater than 1 is either prime or composite. "Neither" is not an option in such a case.