To determine if 618 is a prime number or a composite number, we simply look at the factors for 618.
If the factors of 618 are only 618 and 1, then we know that 618 is a prime number. Otherwise, 618 is a composite number.
To explain better, if 618 is only divisible by 1 and 618, then it is a prime number, and if 618 is divisible by more than 618 and 1, then it is a composite number.
The factors of 618 are as follows:
1, 2, 3, 6, 103, 206, 309, 618
Therefore, since 618 is divisible by more than one and itself, the answer to the
question "Is 618 prime or composite?" is highlighted in blue below.
composite
Is 619 prime or composite?
OK. Now you know that 618 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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