No, 340 is not a prime number. It is a composite number: it is even, so it is divisible by 2.
340 has divisors other than 1 and itself. The smallest is 2: 340 ÷ 2 = 170.
Prime factorization: 340 = 2 × 2 × 5 × 17 = 2² × 5 × 17.
| Number | Prime? |
|---|---|
| 336 | No, 2 × 2 × 2 × 2 × 3 × 7 |
| 337 | Yes |
| 338 | No, 2 × 13 × 13 |
| 339 | No, 3 × 113 |
| 341 | No, 11 × 31 |
| 342 | No, 2 × 3 × 3 × 19 |
| 343 | No, 7 × 7 × 7 |
| 344 | No, 2 × 2 × 2 × 43 |
Another number? Use the prime number checker for any value, or see the list of prime numbers.