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Why is 19 a prime number?

Updated: 12/13/2022
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14y ago

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A Prime number is a number with two and only two factors: 1 (also known as unity) and itself. A composite number is a number with more than two factors; in other words, it has at least one factor besides 1 and itself. 19 does not have any factors besides 1 and itself, so it is a prime number.

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14y ago
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14y ago

You can't multiply anything into 19 besides 1 and itself.

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Q: Why is 19 a prime number?
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