To determine if 691 is a prime number or a composite number, we simply look at the factors for 691.
If the factors of 691 are only 691 and 1, then we know that 691 is a prime number. Otherwise, 691 is a composite number.
To explain better, if 691 is only divisible by 1 and 691, then it is a prime number, and if 691 is divisible by more than 691 and 1, then it is a composite number.
The factors of 691 are as follows:
1, 691
Therefore, since 691 is divisible by only one and itself, the answer to the
question "Is 691 prime or composite?" is highlighted in blue below.
prime
Is 692 prime or composite?
OK. Now you know that 691 is a prime 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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