To determine if 1729 is a prime number or a composite number, we simply look at the factors for 1729.
If the factors of 1729 are only 1729 and 1, then we know that 1729 is a prime number. Otherwise, 1729 is a composite number.
To explain better, if 1729 is only divisible by 1 and 1729, then it is a prime number, and if 1729 is divisible by more than 1729 and 1, then it is a composite number.
The factors of 1729 are as follows:
1, 7, 13, 19, 91, 133, 247, 1729
Therefore, since 1729 is divisible by more than one and itself, the answer to the
question "Is 1729 prime or composite?" is highlighted in blue below.
composite
Is 1730 prime or composite?
OK. Now you know that 1729 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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