To determine if 2805 is a prime number or a composite number, we simply look at the factors for 2805.
If the factors of 2805 are only 2805 and 1, then we know that 2805 is a prime number. Otherwise, 2805 is a composite number.
To explain better, if 2805 is only divisible by 1 and 2805, then it is a prime number, and if 2805 is divisible by more than 2805 and 1, then it is a composite number.
The factors of 2805 are as follows:
1, 3, 5, 11, 15, 17, 33, 51, 55, 85, 165, 187, 255, 561, 935, 2805
Therefore, since 2805 is divisible by more than one and itself, the answer to the
question "Is 2805 prime or composite?" is highlighted in blue below.
composite
Is 2806 prime or composite?
OK. Now you know that 2805 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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