If it has only two factors, it's prime. If it has more than two, it's composite.
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997 is prime. Its only positive integer factors are itself and 1.
A composite number is an integer (usually a positive integer) that can be expressed as the product of smaller integers (other than 1). In other words, a composite number is NOT a prime number, but it has smaller prime numbers as factors.
If x is an integer greater than 1 then it is a composite. Otherwise the answer depends on the value of x.
67 is a prime number. It has no positive integer factors other than itself and 1.
337 is a prime number. It has no positive integer factors other than 1 and itself.