To determine if 455 is a prime number or a composite number, we simply look at the factors for 455.
If the factors of 455 are only 455 and 1, then we know that 455 is a prime number. Otherwise, 455 is a composite number.
To explain better, if 455 is only divisible by 1 and 455, then it is a prime number, and if 455 is divisible by more than 455 and 1, then it is a composite number.
The factors of 455 are as follows:
1, 5, 7, 13, 35, 65, 91, 455
Therefore, since 455 is divisible by more than one and itself, the answer to the
question "Is 455 prime or composite?" is highlighted in blue below.
composite
Is 456 prime or composite?
OK. Now you know that 455 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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