Q: Is 510,991 a Prime Number?

A: No, 510,991 is not a prime number.

Why is 510,991 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 510991 can be evenly divided by 1 13 23 299 1,709 22,217 39,307 and 510,991, with no remainder.

Since 510,991 cannot be divided by just 1 and 510,991, it is not a prime number.

Number	510,989	510,990	510,992	510,993
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).

General Questions

Factoring Questions

Calculation Questions

Miscellaneous Questions