Q: Is 321,315 a Prime Number?

A: No, 321,315 is not a prime number.

Why is 321,315 not a prime number?

A prime number is a natural number, greater than one, that can only be divided by 1 and itself.

The number 321315 can be evenly divided by 1 3 5 15 31 93 155 465 691 2,073 3,455 10,365 21,421 64,263 107,105 and 321,315, with no remainder.

Since 321,315 cannot be divided by just 1 and 321,315, it is not a prime number.

Number	321,313	321,314	321,316	321,317
Prime?	yes	no	no	no

All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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