To determine if 9999 is a prime number or a composite number, we simply look at the factors for 9999.
If the factors of 9999 are only 9999 and 1, then we know that 9999 is a prime number. Otherwise, 9999 is a composite number.
To explain better, if 9999 is only divisible by 1 and 9999, then it is a prime number, and if 9999 is divisible by more than 9999 and 1, then it is a composite number.
The factors of 9999 are as follows:
1, 3, 9, 11, 33, 99, 101, 303, 909, 1111, 3333, 9999
Therefore, since 9999 is divisible by more than one and itself, the answer to the
question "Is 9999 prime or composite?" is highlighted in blue below.
composite
Is 1 prime or composite?
OK. Now you know that 9999 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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