To determine if 1645 is a prime number or a composite number, we simply look at the factors for 1645.
If the factors of 1645 are only 1645 and 1, then we know that 1645 is a prime number. Otherwise, 1645 is a composite number.
To explain better, if 1645 is only divisible by 1 and 1645, then it is a prime number, and if 1645 is divisible by more than 1645 and 1, then it is a composite number.
The factors of 1645 are as follows:
1, 5, 7, 35, 47, 235, 329, 1645
Therefore, since 1645 is divisible by more than one and itself, the answer to the
question "Is 1645 prime or composite?" is highlighted in blue below.
composite
Is 1646 prime or composite?
OK. Now you know that 1645 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.
|
|
