No, there are more normal numbers than prime numbers. Since 2, 3, 5, 13, and 19 are some examples of prime numbers, those only seem to be a few. Remember, numbers can stretch as far as someone wants, so 1,000 isn't a prime number, since you can have 250 and 4 to multiply into it, and 250 and 4 aren't prime numbers. Since the number scale can go on forever, there are more real numbers than prime numbers.
2, 3, and 5 are the prime numbers that go into 30.
The prime numbers (factors) of 18 are: 2 and 3
The prime numbers (factors) of 54 are: 2 and 3
3,
Prime numbers are any numbers that are only divisible by one, and itself. For example, 3 is prime because the only numbers that go into it are 3 and 1. 6 isn't prime because not only can 6 and 1 go into it, but 3 and two can as well.
3 and 31
3 and 19
3 and 5
3 and 7
They are: 3 and 7
3 and 11