1 is not a composite number. A composite number has more than two positive integer factors. The number 1 has just a single fraction - itself.
However, it is not a Prime number, either. A prime number has exactly two positive integer factors - itself and 1.
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1 is not a composite number nor prime because the prime factorization of 1 is 1 x 1 x 1 x 1... and so on - you could put is many 1s as you want!
A number can be factored to determine whether it is prime or composite. A prime number has exactly 2 factors, 1 and the number itself. A composite number has more than two factors.
A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.
If a number is divisible by anything other than itself and 1, it's composite.
A composite number is a positive integer with more than two factors.
Every even number greater than two is composite.