To determine if 3921 is a prime number or a composite number, we simply look at the factors for 3921.
If the factors of 3921 are only 3921 and 1, then we know that 3921 is a prime number. Otherwise, 3921 is a composite number.
To explain better, if 3921 is only divisible by 1 and 3921, then it is a prime number, and if 3921 is divisible by more than 3921 and 1, then it is a composite number.
The factors of 3921 are as follows:
1, 3, 1307, 3921
Therefore, since 3921 is divisible by more than one and itself, the answer to the
question "Is 3921 prime or composite?" is highlighted in blue below.
composite
Is 3922 prime or composite?
OK. Now you know that 3921 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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