Is 943 a prime number?
No, 943 is not a prime number. It is divisible by 23: 943 = 23 × 41.
Is 943 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 √943 ≈ 30.71. If none of them divides 943, it is prime.
- 3
23 divides 943 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 943 = 23 \times 41 \]
Testing 943 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 943 ÷ 2 | leaves 1 |
| 3 | 943 ÷ 3 | leaves 1 |
| 5 | 943 ÷ 5 | leaves 3 |
| 7 | 943 ÷ 7 | leaves 5 |
| 11 | 943 ÷ 11 | leaves 8 |
| 13 | 943 ÷ 13 | leaves 7 |
| 17 | 943 ÷ 17 | leaves 8 |
| 19 | 943 ÷ 19 | leaves 12 |
| 23 | 943 ÷ 23 | divides exactly (41) |
| 29 | 943 ÷ 29 | leaves 15 |
Questions
Is 943 a prime number?
No, 943 is not a prime number. It is divisible by 23: 943 = 23 × 41.
What is the next prime after 943?
947.
What is the prime number before 943?
941.
What are the factors of 943?
1, 23, 41, 943.