To determine if 915 is a prime number or a composite number, we simply look at the factors for 915.
If the factors of 915 are only 915 and 1, then we know that 915 is a prime number. Otherwise, 915 is a composite number.
To explain better, if 915 is only divisible by 1 and 915, then it is a prime number, and if 915 is divisible by more than 915 and 1, then it is a composite number.
The factors of 915 are as follows:
1, 3, 5, 15, 61, 183, 305, 915
Therefore, since 915 is divisible by more than one and itself, the answer to the
question "Is 915 prime or composite?" is highlighted in blue below.
composite
Is 916 prime or composite?
OK. Now you know that 915 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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