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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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.
That is because primality is not defined for 0. Any larger number ending in 0 is divisible by 10 and so cannot be prime.
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679 is the product of the largest single-digit prime number and the largest two-digit prime number.
A prime number is evenly divisible only by itself and one. Any three digit number ending in 0, 2, 4, 6, or 8 is evenly divisible by 2 - so not a prime Any three digit number ending in 5 is divisible by 5, so not a prime number. The only even prime number is 2. The only prime number that ends in 5 is 5.