To determine if 1687 is a prime number or a composite number, we simply look at the factors for 1687.
If the factors of 1687 are only 1687 and 1, then we know that 1687 is a prime number. Otherwise, 1687 is a composite number.
To explain better, if 1687 is only divisible by 1 and 1687, then it is a prime number, and if 1687 is divisible by more than 1687 and 1, then it is a composite number.
The factors of 1687 are as follows:
1, 7, 241, 1687
Therefore, since 1687 is divisible by more than one and itself, the answer to the
question "Is 1687 prime or composite?" is highlighted in blue below.
composite
Is 1688 prime or composite?
OK. Now you know that 1687 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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