To determine if 8391 is a prime number or a composite number, we simply look at the factors for 8391.
If the factors of 8391 are only 8391 and 1, then we know that 8391 is a prime number. Otherwise, 8391 is a composite number.
To explain better, if 8391 is only divisible by 1 and 8391, then it is a prime number, and if 8391 is divisible by more than 8391 and 1, then it is a composite number.
The factors of 8391 are as follows:
1, 3, 2797, 8391
Therefore, since 8391 is divisible by more than one and itself, the answer to the
question "Is 8391 prime or composite?" is highlighted in blue below.
composite
Is 8392 prime or composite?
OK. Now you know that 8391 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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