To determine if 1917 is a prime number or a composite number, we simply look at the factors for 1917.
If the factors of 1917 are only 1917 and 1, then we know that 1917 is a prime number. Otherwise, 1917 is a composite number.
To explain better, if 1917 is only divisible by 1 and 1917, then it is a prime number, and if 1917 is divisible by more than 1917 and 1, then it is a composite number.
The factors of 1917 are as follows:
1, 3, 9, 27, 71, 213, 639, 1917
Therefore, since 1917 is divisible by more than one and itself, the answer to the
question "Is 1917 prime or composite?" is highlighted in blue below.
composite
Is 1918 prime or composite?
OK. Now you know that 1917 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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