Any prime numbers: 3,5,7,11,13,17,19,etc.
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prime numbers
Factors go into numbers, numbers go into multiples. Multiples are bigger than factors.
A number can't be cubed and prime. Cubed numbers (other than 1) have more than two factors.
No 9 is not prime. It's factors are 1,3,9. Proper factors: 1,3. Factors are numbers that are multiplied with other numbers to get a product. Proper factors are factors of a number except for itself. Composite numbers are numbers with more than 2 factors and more than 1 proper factor. Prime is the opposite of composite.
If an odd number has more than two factors then it is a composite number but if it has only two factors then it is a prime number. Although all prime numbers are odd except for 2 many more odd numbers are composite numbers having more than two factors as for example 21 is an odd number whose factors are 1, 3, 7 and 21.