To determine if 1858 is a prime number or a composite number, we simply look at the factors for 1858.
If the factors of 1858 are only 1858 and 1, then we know that 1858 is a prime number. Otherwise, 1858 is a composite number.
To explain better, if 1858 is only divisible by 1 and 1858, then it is a prime number, and if 1858 is divisible by more than 1858 and 1, then it is a composite number.
The factors of 1858 are as follows:
1, 2, 929, 1858
Therefore, since 1858 is divisible by more than one and itself, the answer to the
question "Is 1858 prime or composite?" is highlighted in blue below.
composite
Is 1859 prime or composite?
OK. Now you know that 1858 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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