To determine if 4221 is a prime number or a composite number, we simply look at the factors for 4221.
If the factors of 4221 are only 4221 and 1, then we know that 4221 is a prime number. Otherwise, 4221 is a composite number.
To explain better, if 4221 is only divisible by 1 and 4221, then it is a prime number, and if 4221 is divisible by more than 4221 and 1, then it is a composite number.
The factors of 4221 are as follows:
1, 3, 7, 9, 21, 63, 67, 201, 469, 603, 1407, 4221
Therefore, since 4221 is divisible by more than one and itself, the answer to the
question "Is 4221 prime or composite?" is highlighted in blue below.
composite
Is 4222 prime or composite?
OK. Now you know that 4221 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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