Q: Is 309,991 a Prime Number?

A: No, 309,991 is not a prime number.

Why is 309,991 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 309991 can be evenly divided by 1 11 28,181 and 309,991, with no remainder.

Since 309,991 cannot be divided by just 1 and 309,991, it is not a prime number.

Number	309,989	309,990	309,992	309,993
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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