A Prime number isn't divisible by anything by itself and 1.
All even numbers are divisible by 2. Therefore, all prime numbers are odd.
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They are all odd, and they are all prime numbers
All of the prime numbers are odd except for two.
Except for 2 all other prime numbers are odd. Otherwise, they would be divisible by 2 (and thus not a prime number). This does NOT mean that all odd numbers are prime, but that all prime numbers (aside from 2) are odd.
This is because they are only two factors in that number. It may seem to you that all prime numbers odd, but it is not true. Most of them however, are prime numbers. This is why most of the odd numbers are prime numbers.
All prime numbers are odd except one prime number and that is 2.