3 is a prime number. Any number that only has itself and one as
factors is a prime number. Therefore, since there are no factors of
3 other than one and itself it is a prime number.

Factors can be prime or composite. The factors of 30 are 1,2,3,5,6,10,15 and 30. Of these, 3 and 5 are prime. The rest are composite except for 1, which is neither.

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. -3 is neither.

the number "1" is neither prime or composite the only number that go into "1" is 1. A prime number is a number that only has 2 factors.And a composite number has 3 or more factors.

Prime numbers have only 2 factors, 1 and itself. Composite numbers have 3 or more factors. 1 has only 1 factor, so it is neither a prime number or a composite number.