No, 188 is not a prime number. It is a composite number: it is even, so it is divisible by 2.
188 has divisors other than 1 and itself. The smallest is 2: 188 ÷ 2 = 94.
Prime factorization: 188 = 2 × 2 × 47 = 2² × 47.
| Number | Prime? |
|---|---|
| 184 | No, 2 × 2 × 2 × 23 |
| 185 | No, 5 × 37 |
| 186 | No, 2 × 3 × 31 |
| 187 | No, 11 × 17 |
| 189 | No, 3 × 3 × 3 × 7 |
| 190 | No, 2 × 5 × 19 |
| 191 | Yes |
| 192 | No, 2 × 2 × 2 × 2 × 2 × 2 × 3 |
More about 188: factors of 188 · square root of 188 · 188 in binary.
Another number? Use the prime number checker for any value, or see the list of prime numbers.