No, 247 is not a prime number. It is a composite number: 247 = 13 × 19.
247 has divisors other than 1 and itself. The smallest is 13: 247 ÷ 13 = 19.
Prime factorization: 247 = 13 × 19.
| Number | Prime? |
|---|---|
| 243 | No, 3 × 3 × 3 × 3 × 3 |
| 244 | No, 2 × 2 × 61 |
| 245 | No, 5 × 7 × 7 |
| 246 | No, 2 × 3 × 41 |
| 248 | No, 2 × 2 × 2 × 31 |
| 249 | No, 3 × 83 |
| 250 | No, 2 × 5 × 5 × 5 |
| 251 | Yes |
More about 247: 247 in binary.
Another number? Use the prime number checker for any value, or see the list of prime numbers.