To determine if 5115 is a prime number or a composite number, we simply look at the factors for 5115.
If the factors of 5115 are only 5115 and 1, then we know that 5115 is a prime number. Otherwise, 5115 is a composite number.
To explain better, if 5115 is only divisible by 1 and 5115, then it is a prime number, and if 5115 is divisible by more than 5115 and 1, then it is a composite number.
The factors of 5115 are as follows:
1, 3, 5, 11, 15, 31, 33, 55, 93, 155, 165, 341, 465, 1023, 1705, 5115
Therefore, since 5115 is divisible by more than one and itself, the answer to the
question "Is 5115 prime or composite?" is highlighted in blue below.
composite
Is 5116 prime or composite?
OK. Now you know that 5115 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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