Q: Is 321,980 a Prime Number?

A: No, 321,980 is not a prime number.

Why is 321,980 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 321980 can be evenly divided by 1 2 4 5 10 17 20 34 68 85 170 340 947 1,894 3,788 4,735 9,470 16,099 18,940 32,198 64,396 80,495 160,990 and 321,980, with no remainder.

Since 321,980 cannot be divided by just 1 and 321,980, it is not a prime number.

Number	321,978	321,979	321,981	321,982
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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