To determine if 1428 is a prime number or a composite number, we simply look at the factors for 1428.
If the factors of 1428 are only 1428 and 1, then we know that 1428 is a prime number. Otherwise, 1428 is a composite number.
To explain better, if 1428 is only divisible by 1 and 1428, then it is a prime number, and if 1428 is divisible by more than 1428 and 1, then it is a composite number.
The factors of 1428 are as follows:
1, 2, 3, 4, 6, 7, 12, 14, 17, 21, 28, 34, 42, 51, 68, 84, 102, 119, 204, 238, 357, 476, 714, 1428
Therefore, since 1428 is divisible by more than one and itself, the answer to the
question "Is 1428 prime or composite?" is highlighted in blue below.
composite
Is 1429 prime or composite?
OK. Now you know that 1428 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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