No, 312 is not a prime number. It is a composite number: it is even, so it is divisible by 2.
312 has divisors other than 1 and itself. The smallest is 2: 312 ÷ 2 = 156.
Prime factorization: 312 = 2 × 2 × 2 × 3 × 13 = 2³ × 3 × 13.
| Number | Prime? |
|---|---|
| 308 | No, 2 × 2 × 7 × 11 |
| 309 | No, 3 × 103 |
| 310 | No, 2 × 5 × 31 |
| 311 | Yes |
| 313 | Yes |
| 314 | No, 2 × 157 |
| 315 | No, 3 × 3 × 5 × 7 |
| 316 | No, 2 × 2 × 79 |
Another number? Use the prime number checker for any value, or see the list of prime numbers.