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I will assume you mean "positive integers". In this case, the only number that is considered neither prime nor composite is the number 1. 1 has the special role of the identity element of multiplication, meaning that if you multiply a number by 1, it remains unchanged.

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Q: What is the name for a number that is not prime or composite?
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Related questions

What is the other name if it is not a prime number?

It is then a composite number with the exception of 1 which is not a prime or a composite number


What is the name of number that is not a prime number?

Composite.


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There is no name for numbers which are neither prime nor composite.


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No composite numbers are prime. A composite number is a number that can be made by multiplying other numbers. A prime number is made only by one and itself. Therefore no number can be both prime and composite


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There is no special name for it. It is simply neither prime nor composite.


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