To determine if 3989 is a prime number or a composite number, we simply look at the factors for 3989.
If the factors of 3989 are only 3989 and 1, then we know that 3989 is a prime number. Otherwise, 3989 is a composite number.
To explain better, if 3989 is only divisible by 1 and 3989, then it is a prime number, and if 3989 is divisible by more than 3989 and 1, then it is a composite number.
The factors of 3989 are as follows:
1, 3989
Therefore, since 3989 is divisible by only one and itself, the answer to the
question "Is 3989 prime or composite?" is highlighted in blue below.
prime
Is 3990 prime or composite?
OK. Now you know that 3989 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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