To determine if 1909 is a prime number or a composite number, we simply look at the factors for 1909.
If the factors of 1909 are only 1909 and 1, then we know that 1909 is a prime number. Otherwise, 1909 is a composite number.
To explain better, if 1909 is only divisible by 1 and 1909, then it is a prime number, and if 1909 is divisible by more than 1909 and 1, then it is a composite number.
The factors of 1909 are as follows:
1, 23, 83, 1909
Therefore, since 1909 is divisible by more than one and itself, the answer to the
question "Is 1909 prime or composite?" is highlighted in blue below.
composite
Is 1910 prime or composite?
OK. Now you know that 1909 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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