To determine if 8439 is a prime number or a composite number, we simply look at the factors for 8439.
If the factors of 8439 are only 8439 and 1, then we know that 8439 is a prime number. Otherwise, 8439 is a composite number.
To explain better, if 8439 is only divisible by 1 and 8439, then it is a prime number, and if 8439 is divisible by more than 8439 and 1, then it is a composite number.
The factors of 8439 are as follows:
1, 3, 29, 87, 97, 291, 2813, 8439
Therefore, since 8439 is divisible by more than one and itself, the answer to the
question "Is 8439 prime or composite?" is highlighted in blue below.
composite
Is 8440 prime or composite?
OK. Now you know that 8439 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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