To determine if 2009 is a prime number or a composite number, we simply look at the factors for 2009.
If the factors of 2009 are only 2009 and 1, then we know that 2009 is a prime number. Otherwise, 2009 is a composite number.
To explain better, if 2009 is only divisible by 1 and 2009, then it is a prime number, and if 2009 is divisible by more than 2009 and 1, then it is a composite number.
The factors of 2009 are as follows:
1, 7, 41, 49, 287, 2009
Therefore, since 2009 is divisible by more than one and itself, the answer to the
question "Is 2009 prime or composite?" is highlighted in blue below.
composite
Is 2010 prime or composite?
OK. Now you know that 2009 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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