Is 2443 a prime number?
No, 2443 is not a prime number. It is divisible by 7: 2443 = 7 × 349.
Is 2443 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 √2443 ≈ 49.43. If none of them divides 2443, it is prime.
- 3
7 divides 2443 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 2443 = 7 \times 349 \]
Testing 2443 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 2443 ÷ 2 | leaves 1 |
| 3 | 2443 ÷ 3 | leaves 1 |
| 5 | 2443 ÷ 5 | leaves 3 |
| 7 | 2443 ÷ 7 | divides exactly (349) |
| 11 | 2443 ÷ 11 | leaves 1 |
| 13 | 2443 ÷ 13 | leaves 12 |
| 17 | 2443 ÷ 17 | leaves 12 |
| 19 | 2443 ÷ 19 | leaves 11 |
| 23 | 2443 ÷ 23 | leaves 5 |
| 29 | 2443 ÷ 29 | leaves 7 |
| 31 | 2443 ÷ 31 | leaves 25 |
| 37 | 2443 ÷ 37 | leaves 1 |
Questions
Is 2443 a prime number?
No, 2443 is not a prime number. It is divisible by 7: 2443 = 7 × 349.
What is the next prime after 2443?
2447.
What is the prime number before 2443?
2441.
What are the factors of 2443?
1, 7, 349, 2443.