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A number that is neither prime nor composite is the number 1. You can see that it's not because it doesn't have any more factors than 1 and itself, but that doesn't make sense. So therefore, it is neither prime nor composite.

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12y ago
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7y ago

Any irrational number, and rational which is not an integer, any integer less than or equal to 1.

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7y ago

0 and 1

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Q: What number is not composite or prime?
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