Is 424 a prime number?
No, 424 is not a prime number. It is divisible by 2: 424 = 2 × 212.
Is 424 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 √424 ≈ 20.59. If none of them divides 424, it is prime.
- 3
2 divides 424 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 424 = 2^{3} \times 53 \]Testing 424 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 424 ÷ 2 | divides exactly (212) |
| 3 | 424 ÷ 3 | leaves 1 |
| 5 | 424 ÷ 5 | leaves 4 |
| 7 | 424 ÷ 7 | leaves 4 |
| 11 | 424 ÷ 11 | leaves 6 |
| 13 | 424 ÷ 13 | leaves 8 |
| 17 | 424 ÷ 17 | leaves 16 |
| 19 | 424 ÷ 19 | leaves 6 |
Questions
Is 424 a prime number?
No, 424 is not a prime number. It is divisible by 2: 424 = 2 × 212.
What is the next prime after 424?
431.
What is the prime number before 424?
421.
What are the factors of 424?
1, 2, 4, 8, 53, 106, 212, 424.