No, 291 is not a prime number. It is a composite number: its digits add up to 12, which is divisible by 3, so 291 is divisible by 3.
291 has divisors other than 1 and itself. The smallest is 3: 291 ÷ 3 = 97.
Prime factorization: 291 = 3 × 97.
| Number | Prime? |
|---|---|
| 287 | No, 7 × 41 |
| 288 | No, 2 × 2 × 2 × 2 × 2 × 3 × 3 |
| 289 | No, 17 × 17 |
| 290 | No, 2 × 5 × 29 |
| 292 | No, 2 × 2 × 73 |
| 293 | Yes |
| 294 | No, 2 × 3 × 7 × 7 |
| 295 | No, 5 × 59 |
Another number? Use the prime number checker for any value, or see the list of prime numbers.