1 is not prime or composite because first, prime numbers are divisible by 1 and itself so 1 is itself and that is only one number. It is not composite because it only has one factor, itself.
0 is not prime or composite because it has an infinite number of divisors because any whole number that isn't 0 divides 0. It can't be written as two numbers so it can't be prime and for that same reason it can't even be composite.
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43 is a prime number. 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.
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. 38 is composite.
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. 72 is composite.
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. 170 is composite.
10011 is a composite number. 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.