They are neither
Both zero and one are considered neither prime nor composite.
Zero and one.
Zero is neither composite nor prime.
There is no name for numbers which are neither prime nor composite.
Zero and one are neither prime nor composite, every other positive integer is one or the other.
It is 1 that is not considered to be a prime or a composite number because it has only one factor which is itself
First, zero is not applied to the terms prime and composite because the definitions only apply to natural numbers (positive whole numbers, which does not include zero). One is not prime or composite because one is the unit that is used within the definition of prime of composite numbers, and many definitions of prime and composite even exclude one from the definition. If you want to categorize one within a discussion of prime and composite, it is common to simply call one the unit.
One and zero, respectively.
Zero is an even number but it is not composite (nor prime).
Zero is not a prime number.
Because it has no factors