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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Any even number (except 2) is NOT prime - it is divisible by 2. An even number is (by definition) a multiple of 2; but it can quickly be recognized by the last digit. If the last digit is 0, 2, 4, 6, or 8, the number is even.Any even number (except 2) is NOT prime - it is divisible by 2. An even number is (by definition) a multiple of 2; but it can quickly be recognized by the last digit. If the last digit is 0, 2, 4, 6, or 8, the number is even.Any even number (except 2) is NOT prime - it is divisible by 2. An even number is (by definition) a multiple of 2; but it can quickly be recognized by the last digit. If the last digit is 0, 2, 4, 6, or 8, the number is even.Any even number (except 2) is NOT prime - it is divisible by 2. An even number is (by definition) a multiple of 2; but it can quickly be recognized by the last digit. If the last digit is 0, 2, 4, 6, or 8, the number is even.
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.
to be divisible by 5 the last digit of the number has to be 0 or 5
0, 2, 4, 6, or 8
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.