To determine if 991 is a prime number or a composite number, we simply look at the factors for 991.
If the factors of 991 are only 991 and 1, then we know that 991 is a prime number. Otherwise, 991 is a composite number.
To explain better, if 991 is only divisible by 1 and 991, then it is a prime number, and if 991 is divisible by more than 991 and 1, then it is a composite number.
The factors of 991 are as follows:
1, 991
Therefore, since 991 is divisible by only one and itself, the answer to the
question "Is 991 prime or composite?" is highlighted in blue below.
prime
Is 992 prime or composite?
OK. Now you know that 991 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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