Is 256 a prime number?

Is 256 a prime or composite number?

Answer: Number 256 is not a Prime
256 - is not a Prime Number because it has 9 factors: 1, 2, 4, 8, 16, 32, 64, 128, 256
Number should have exactly two factors to be classified as a Prime number
For 256 to be a prime number it must have only two divisors - 1 and itself (256)

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 256 a prime or composite number? (The answer is: No). Enter number (e.g. '256') 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
Yes
242No
No
244No
245No
246No
No
No
No
No
Yes
252No
No
254No
No
No
Yes
258No
No
260No
No
262No
Yes
264No
265No
266No
No
268No
Yes
No

FAQ

Is 256 a prime or composite number?

Number 256 is not a Prime

How many factors are in a number 256?

9