To determine if 585 is a prime number or a composite number, we simply look at the factors for 585.
If the factors of 585 are only 585 and 1, then we know that 585 is a prime number. Otherwise, 585 is a composite number.
To explain better, if 585 is only divisible by 1 and 585, then it is a prime number, and if 585 is divisible by more than 585 and 1, then it is a composite number.
The factors of 585 are as follows:
1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 195, 585
Therefore, since 585 is divisible by more than one and itself, the answer to the
question "Is 585 prime or composite?" is highlighted in blue below.
composite
Is 586 prime or composite?
OK. Now you know that 585 is a composite number. Use our logic above and see if
you can figure out if the next number on our list is prime or composite before you check your answer.
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