To determine if 5145 is a prime number or a composite number, we simply look at the factors for 5145.
If the factors of 5145 are only 5145 and 1, then we know that 5145 is a prime number. Otherwise, 5145 is a composite number.
To explain better, if 5145 is only divisible by 1 and 5145, then it is a prime number, and if 5145 is divisible by more than 5145 and 1, then it is a composite number.
The factors of 5145 are as follows:
1, 3, 5, 7, 15, 21, 35, 49, 105, 147, 245, 343, 735, 1029, 1715, 5145
Therefore, since 5145 is divisible by more than one and itself, the answer to the
question "Is 5145 prime or composite?" is highlighted in blue below.
composite
Is 5146 prime or composite?
OK. Now you know that 5145 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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