To determine if 1919 is a prime number or a composite number, we simply look at the factors for 1919.
If the factors of 1919 are only 1919 and 1, then we know that 1919 is a prime number. Otherwise, 1919 is a composite number.
To explain better, if 1919 is only divisible by 1 and 1919, then it is a prime number, and if 1919 is divisible by more than 1919 and 1, then it is a composite number.
The factors of 1919 are as follows:
1, 19, 101, 1919
Therefore, since 1919 is divisible by more than one and itself, the answer to the
question "Is 1919 prime or composite?" is highlighted in blue below.
composite
Is 1920 prime or composite?
OK. Now you know that 1919 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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