Is 249 a prime number?
No, 249 is not a prime number. It is divisible by 3: 249 = 3 × 83.
Is 249 prime?
Pick any whole number from 1 to 10,000.
How to work it out
- 1
A prime number has exactly two factors: 1 and itself.
- 2
It is enough to test the primes up to √249 ≈ 15.78. If none of them divides 249, it is prime.
- 3
3 divides 249 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 249 = 3 \times 83 \]
Testing 249 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 249 ÷ 2 | leaves 1 |
| 3 | 249 ÷ 3 | divides exactly (83) |
| 5 | 249 ÷ 5 | leaves 4 |
| 7 | 249 ÷ 7 | leaves 4 |
| 11 | 249 ÷ 11 | leaves 7 |
| 13 | 249 ÷ 13 | leaves 2 |
Questions
Is 249 a prime number?
No, 249 is not a prime number. It is divisible by 3: 249 = 3 × 83.
What is the next prime after 249?
251.
What is the prime number before 249?
241.
What are the factors of 249?
1, 3, 83, 249.