No, 320 is not a prime number. It is a composite number: it is even, so it is divisible by 2.
320 has divisors other than 1 and itself. The smallest is 2: 320 ÷ 2 = 160.
Prime factorization: 320 = 2 × 2 × 2 × 2 × 2 × 2 × 5 = 2⁶ × 5.
| Number | Prime? |
|---|---|
| 316 | No, 2 × 2 × 79 |
| 317 | Yes |
| 318 | No, 2 × 3 × 53 |
| 319 | No, 11 × 29 |
| 321 | No, 3 × 107 |
| 322 | No, 2 × 7 × 23 |
| 323 | No, 17 × 19 |
| 324 | No, 2 × 2 × 3 × 3 × 3 × 3 |
More about 320: factors of 320.
Another number? Use the prime number checker for any value, or see the list of prime numbers.