No, 258 is not a prime number. It is a composite number: it is even, so it is divisible by 2.
258 has divisors other than 1 and itself. The smallest is 2: 258 ÷ 2 = 129.
Prime factorization: 258 = 2 × 3 × 43.
| Number | Prime? |
|---|---|
| 254 | No, 2 × 127 |
| 255 | No, 3 × 5 × 17 |
| 256 | No, 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 |
| 257 | Yes |
| 259 | No, 7 × 37 |
| 260 | No, 2 × 2 × 5 × 13 |
| 261 | No, 3 × 3 × 29 |
| 262 | No, 2 × 131 |
Another number? Use the prime number checker for any value, or see the list of prime numbers.