To determine if 9919 is a prime number or a composite number, we simply look at the factors for 9919.
If the factors of 9919 are only 9919 and 1, then we know that 9919 is a prime number. Otherwise, 9919 is a composite number.
To explain better, if 9919 is only divisible by 1 and 9919, then it is a prime number, and if 9919 is divisible by more than 9919 and 1, then it is a composite number.
The factors of 9919 are as follows:
1, 7, 13, 91, 109, 763, 1417, 9919
Therefore, since 9919 is divisible by more than one and itself, the answer to the
question "Is 9919 prime or composite?" is highlighted in blue below.
composite
Is 9920 prime or composite?
OK. Now you know that 9919 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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