To determine if 1918 is a prime number or a composite number, we simply look at the factors for 1918.
If the factors of 1918 are only 1918 and 1, then we know that 1918 is a prime number. Otherwise, 1918 is a composite number.
To explain better, if 1918 is only divisible by 1 and 1918, then it is a prime number, and if 1918 is divisible by more than 1918 and 1, then it is a composite number.
The factors of 1918 are as follows:
1, 2, 7, 14, 137, 274, 959, 1918
Therefore, since 1918 is divisible by more than one and itself, the answer to the
question "Is 1918 prime or composite?" is highlighted in blue below.
composite
Is 1919 prime or composite?
OK. Now you know that 1918 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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