To determine if 4239 is a prime number or a composite number, we simply look at the factors for 4239.
If the factors of 4239 are only 4239 and 1, then we know that 4239 is a prime number. Otherwise, 4239 is a composite number.
To explain better, if 4239 is only divisible by 1 and 4239, then it is a prime number, and if 4239 is divisible by more than 4239 and 1, then it is a composite number.
The factors of 4239 are as follows:
1, 3, 9, 27, 157, 471, 1413, 4239
Therefore, since 4239 is divisible by more than one and itself, the answer to the
question "Is 4239 prime or composite?" is highlighted in blue below.
composite
Is 4240 prime or composite?
OK. Now you know that 4239 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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