No, 275 is not a prime number. It is a composite number: it ends in 5, so it is divisible by 5.
275 has divisors other than 1 and itself. The smallest is 5: 275 ÷ 5 = 55.
Prime factorization: 275 = 5 × 5 × 11 = 5² × 11.
| Number | Prime? |
|---|---|
| 271 | Yes |
| 272 | No, 2 × 2 × 2 × 2 × 17 |
| 273 | No, 3 × 7 × 13 |
| 274 | No, 2 × 137 |
| 276 | No, 2 × 2 × 3 × 23 |
| 277 | Yes |
| 278 | No, 2 × 139 |
| 279 | No, 3 × 3 × 31 |
Another number? Use the prime number checker for any value, or see the list of prime numbers.