To determine if 1455 is a prime number or a composite number, we simply look at the factors for 1455.
If the factors of 1455 are only 1455 and 1, then we know that 1455 is a prime number. Otherwise, 1455 is a composite number.
To explain better, if 1455 is only divisible by 1 and 1455, then it is a prime number, and if 1455 is divisible by more than 1455 and 1, then it is a composite number.
The factors of 1455 are as follows:
1, 3, 5, 15, 97, 291, 485, 1455
Therefore, since 1455 is divisible by more than one and itself, the answer to the
question "Is 1455 prime or composite?" is highlighted in blue below.
composite
Is 1456 prime or composite?
OK. Now you know that 1455 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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