To determine if 1585 is a prime number or a composite number, we simply look at the factors for 1585.
If the factors of 1585 are only 1585 and 1, then we know that 1585 is a prime number. Otherwise, 1585 is a composite number.
To explain better, if 1585 is only divisible by 1 and 1585, then it is a prime number, and if 1585 is divisible by more than 1585 and 1, then it is a composite number.
The factors of 1585 are as follows:
1, 5, 317, 1585
Therefore, since 1585 is divisible by more than one and itself, the answer to the
question "Is 1585 prime or composite?" is highlighted in blue below.
composite
Is 1586 prime or composite?
OK. Now you know that 1585 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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