Is 443 a prime number?
Yes, 443 is a prime number. Its only factors are 1 and 443.
Is 443 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 √443 ≈ 21.05. If none of them divides 443, it is prime.
- 3
None of them divides 443, so it is prime.
Testing 443 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 443 ÷ 2 | leaves 1 |
| 3 | 443 ÷ 3 | leaves 2 |
| 5 | 443 ÷ 5 | leaves 3 |
| 7 | 443 ÷ 7 | leaves 2 |
| 11 | 443 ÷ 11 | leaves 3 |
| 13 | 443 ÷ 13 | leaves 1 |
| 17 | 443 ÷ 17 | leaves 1 |
| 19 | 443 ÷ 19 | leaves 6 |
Questions
Is 443 a prime number?
Yes, 443 is a prime number. Its only factors are 1 and 443.
What is the next prime after 443?
449.
What is the prime number before 443?
439.
What are the factors of 443?
1, 443.