To determine if 1289 is a prime number or a composite number, we simply look at the factors for 1289.
If the factors of 1289 are only 1289 and 1, then we know that 1289 is a prime number. Otherwise, 1289 is a composite number.
To explain better, if 1289 is only divisible by 1 and 1289, then it is a prime number, and if 1289 is divisible by more than 1289 and 1, then it is a composite number.
The factors of 1289 are as follows:
1, 1289
Therefore, since 1289 is divisible by only one and itself, the answer to the
question "Is 1289 prime or composite?" is highlighted in blue below.
prime
Is 1290 prime or composite?
OK. Now you know that 1289 is a prime 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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