To determine if 261 is a prime number or a composite number, we simply look at the factors for 261.
If the factors of 261 are only 261 and 1, then we know that 261 is a prime number. Otherwise, 261 is a composite number.
To explain better, if 261 is only divisible by 1 and 261, then it is a prime number, and if 261 is divisible by more than 261 and 1, then it is a composite number.
The factors of 261 are as follows:
1, 3, 9, 29, 87, 261
Therefore, since 261 is divisible by more than one and itself, the answer to the
question "Is 261 prime or composite?" is highlighted in blue below.
composite
Is 262 prime or composite?
OK. Now you know that 261 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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