Is 1443 a prime number?
No, 1443 is not a prime number. It is divisible by 3: 1443 = 3 × 481.
Is 1443 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 √1443 ≈ 37.99. If none of them divides 1443, it is prime.
- 3
3 divides 1443 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 1443 = 3 \times 13 \times 37 \]
Testing 1443 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 1443 ÷ 2 | leaves 1 |
| 3 | 1443 ÷ 3 | divides exactly (481) |
| 5 | 1443 ÷ 5 | leaves 3 |
| 7 | 1443 ÷ 7 | leaves 1 |
| 11 | 1443 ÷ 11 | leaves 2 |
| 13 | 1443 ÷ 13 | divides exactly (111) |
| 17 | 1443 ÷ 17 | leaves 15 |
| 19 | 1443 ÷ 19 | leaves 18 |
| 23 | 1443 ÷ 23 | leaves 17 |
| 29 | 1443 ÷ 29 | leaves 22 |
| 31 | 1443 ÷ 31 | leaves 17 |
| 37 | 1443 ÷ 37 | divides exactly (39) |
Questions
Is 1443 a prime number?
No, 1443 is not a prime number. It is divisible by 3: 1443 = 3 × 481.
What is the next prime after 1443?
1447.
What is the prime number before 1443?
1439.
What are the factors of 1443?
1, 3, 13, 37, 39, 111, 481, 1443.