To determine if 143 is a prime number or a composite number, we simply look at the factors for 143.
If the factors of 143 are only 143 and 1, then we know that 143 is a prime number. Otherwise, 143 is a composite number.
To explain better, if 143 is only divisible by 1 and 143, then it is a prime number, and if 143 is divisible by more than 143 and 1, then it is a composite number.
The factors of 143 are as follows:
1, 11, 13, 143
Therefore, since 143 is divisible by more than one and itself, the answer to the
question "Is 143 prime or composite?" is highlighted in blue below.
composite
Is 144 prime or composite?
OK. Now you know that 143 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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