Is 321 a prime number?

Is 321 a prime or composite number?

Answer: Number 321 is not a Prime
321 - is not a Prime Number because it has 4 factors: 1, 3, 107, 321
Number should have exactly two factors to be classified as a Prime number
For 321 to be a prime number it must have only two divisors - 1 and itself (321)

See Also

About "Is number a Prime" Calculator

This calculator will help you find out if a given number is Prime. For example, it can help you find out is 321 a prime or composite number? (The answer is: No). Enter number (e.g. '321') and hit the 'Calculate' button.
Prime numbers are the positive integers having only two factors - 1 and the number itself

Prime numbers list

NumberIs Prime
306No
Yes
308No
309No
No
Yes
312No
Yes
314No
315No
316No
Yes
318No
No
320No
No
322No
No
No
No
326No
No
No
No
330No
Yes
332No
No
334No
No

FAQ

Is 321 a prime or composite number?

Number 321 is not a Prime

How many factors are in a number 321?

4