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Everything that has 0 as its digit can be divided by both 2, and 5 as well as many more. Therefore it cannot be a Prime number.

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Q: Why can a prime number not have 0 as its digit?
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What is the largest 2 digit prime number?

97A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite. 97 is the largest 2 digit prime number.


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