To determine if 428 is a prime number or a composite number, we simply look at the factors for 428.
If the factors of 428 are only 428 and 1, then we know that 428 is a prime number. Otherwise, 428 is a composite number.
To explain better, if 428 is only divisible by 1 and 428, then it is a prime number, and if 428 is divisible by more than 428 and 1, then it is a composite number.
The factors of 428 are as follows:
1, 2, 4, 107, 214, 428
Therefore, since 428 is divisible by more than one and itself, the answer to the
question "Is 428 prime or composite?" is highlighted in blue below.
composite
Is 429 prime or composite?
OK. Now you know that 428 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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