To determine if 1243 is a prime number or a composite number, we simply look at the factors for 1243.
If the factors of 1243 are only 1243 and 1, then we know that 1243 is a prime number. Otherwise, 1243 is a composite number.
To explain better, if 1243 is only divisible by 1 and 1243, then it is a prime number, and if 1243 is divisible by more than 1243 and 1, then it is a composite number.
The factors of 1243 are as follows:
1, 11, 113, 1243
Therefore, since 1243 is divisible by more than one and itself, the answer to the
question "Is 1243 prime or composite?" is highlighted in blue below.
composite
Is 1244 prime or composite?
OK. Now you know that 1243 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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