Prime numbers are positive integers which can be evenly divided only by 1 and themselves. There is no other rule for all prime numbers.
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The divisibility rules for a prime number is if it is ONLY divisible by 1, and itself.
No, all prime numbers are deficient.
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.
All prime numbers are odd except one prime number and that is 2.
A factor can or cannot be a prime number Ex: 2 is the factor of all other even numbers its a prime number but 9 is a factor of 18 and its not a prime number A prime is a factor but a factor being a prime number varies