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A Prime number has exactly 2 factors.

A composite number must have at least 3 factors.

1 does not fall into either of the above definitions so it is not composite.

It used to be considered a prime number but is not any longer.

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Q: Is the number one a composite number?
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Related questions

Is one a composite number?

One (1) is not a composite number.


Which statement is true a.twenty-nine is a composite number b.thirty-one is a composite number c.fifty-one is a composite number d.fifty-one is a composite number?

Your options C and D are the same, but it is true that 51 is a composite number.


Why is one a composite number?

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Is the number 1 composite or prime and why?

1 is neither a prime nor a composite number because it has only one factor (itself (1)). The definition of a prime number is a number that has the factor of one and itself, so one is not prime. The definition of a composite number is a number that has more than 2 factors, so one is not composite. One is a special number.


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4 is the least one digit composite number


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A composite number is basically one that is NOT a prime - a composite number is a product of two or more primes.


Is 222 prime or composite?

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21 is composite number because it has more than one number that goes into it


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