Q: Is 81,980 a Prime Number?

A: No, 81,980 is not a prime number.

Why is 81,980 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 81980 can be evenly divided by 1 2 4 5 10 20 4,099 8,198 16,396 20,495 40,990 and 81,980, with no remainder.

Since 81,980 cannot be divided by just 1 and 81,980, it is not a prime number.

Number	81,978	81,979	81,981	81,982
Prime?	no	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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