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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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12y ago
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Q: Is the number 1 composite or prime and why?
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