No, 266 is not a prime number. It is a composite number: it is even, so it is divisible by 2.
266 has divisors other than 1 and itself. The smallest is 2: 266 ÷ 2 = 133.
Prime factorization: 266 = 2 × 7 × 19.
| Number | Prime? |
|---|---|
| 262 | No, 2 × 131 |
| 263 | Yes |
| 264 | No, 2 × 2 × 2 × 3 × 11 |
| 265 | No, 5 × 53 |
| 267 | No, 3 × 89 |
| 268 | No, 2 × 2 × 67 |
| 269 | Yes |
| 270 | No, 2 × 3 × 3 × 3 × 5 |
Another number? Use the prime number checker for any value, or see the list of prime numbers.