To determine if 2190 is a prime number or a composite number, we simply look at the factors for 2190.
If the factors of 2190 are only 2190 and 1, then we know that 2190 is a prime number. Otherwise, 2190 is a composite number.
To explain better, if 2190 is only divisible by 1 and 2190, then it is a prime number, and if 2190 is divisible by more than 2190 and 1, then it is a composite number.
The factors of 2190 are as follows:
1, 2, 3, 5, 6, 10, 15, 30, 73, 146, 219, 365, 438, 730, 1095, 2190
Therefore, since 2190 is divisible by more than one and itself, the answer to the
question "Is 2190 prime or composite?" is highlighted in blue below.
composite
Is 2191 prime or composite?
OK. Now you know that 2190 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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