No, 306 is not a prime number. It is a composite number: it is even, so it is divisible by 2.
306 has divisors other than 1 and itself. The smallest is 2: 306 ÷ 2 = 153.
Prime factorization: 306 = 2 × 3 × 3 × 17 = 2 × 3² × 17.
| Number | Prime? |
|---|---|
| 302 | No, 2 × 151 |
| 303 | No, 3 × 101 |
| 304 | No, 2 × 2 × 2 × 2 × 19 |
| 305 | No, 5 × 61 |
| 307 | Yes |
| 308 | No, 2 × 2 × 7 × 11 |
| 309 | No, 3 × 103 |
| 310 | No, 2 × 5 × 31 |
Another number? Use the prime number checker for any value, or see the list of prime numbers.