To determine if 2105 is a prime number or a composite number, we simply look at the factors for 2105.
If the factors of 2105 are only 2105 and 1, then we know that 2105 is a prime number. Otherwise, 2105 is a composite number.
To explain better, if 2105 is only divisible by 1 and 2105, then it is a prime number, and if 2105 is divisible by more than 2105 and 1, then it is a composite number.
The factors of 2105 are as follows:
1, 5, 421, 2105
Therefore, since 2105 is divisible by more than one and itself, the answer to the
question "Is 2105 prime or composite?" is highlighted in blue below.
composite
Is 2106 prime or composite?
OK. Now you know that 2105 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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