No, 100 is not a prime number. It is a composite number: it is even, so it is divisible by 2.
100 has divisors other than 1 and itself. The smallest is 2: 100 ÷ 2 = 50.
Prime factorization: 100 = 2 × 2 × 5 × 5 = 2² × 5².
| Number | Prime? |
|---|---|
| 96 | No, 2 × 2 × 2 × 2 × 2 × 3 |
| 97 | Yes |
| 98 | No, 2 × 7 × 7 |
| 99 | No, 3 × 3 × 11 |
| 101 | Yes |
| 102 | No, 2 × 3 × 17 |
| 103 | Yes |
| 104 | No, 2 × 2 × 2 × 13 |
More about 100: factors of 100 · 100 squared · square root of 100 · 100 in binary · 100 in Roman numerals.
Another number? Use the prime number checker for any value, or see the list of prime numbers.