To determine if 289 is a prime number or a composite number, we simply look at the factors for 289.
If the factors of 289 are only 289 and 1, then we know that 289 is a prime number. Otherwise, 289 is a composite number.
To explain better, if 289 is only divisible by 1 and 289, then it is a prime number, and if 289 is divisible by more than 289 and 1, then it is a composite number.
The factors of 289 are as follows:
1, 17, 289
Therefore, since 289 is divisible by more than one and itself, the answer to the
question "Is 289 prime or composite?" is highlighted in blue below.
composite
Is 290 prime or composite?
OK. Now you know that 289 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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