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Why 1 neither prime or composite number?

Anonymous

∙ 9y ago

Updated: 8/21/2019

Because the property of being a prime or composite is defined only for numbers which are two or larger. If 1 were considered a prime then the fundamental theorem of arithmetic - the unique prime factorisation theorem - would fail.

Wiki User

∙ 9y ago

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More answers

Prime numbers have two factors. Composite numbers have more than two. 1 doesn't have enough factors to qualify for either.

Wiki User

∙ 9y ago

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