To determine if 1690 is a prime number or a composite number, we simply look at the factors for 1690.
If the factors of 1690 are only 1690 and 1, then we know that 1690 is a prime number. Otherwise, 1690 is a composite number.
To explain better, if 1690 is only divisible by 1 and 1690, then it is a prime number, and if 1690 is divisible by more than 1690 and 1, then it is a composite number.
The factors of 1690 are as follows:
1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1690
Therefore, since 1690 is divisible by more than one and itself, the answer to the
question "Is 1690 prime or composite?" is highlighted in blue below.
composite
Is 1691 prime or composite?
OK. Now you know that 1690 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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