Is 8428 a prime number?
No, 8428 is not a prime number. It is divisible by 2: 8428 = 2 × 4214.
Is 8428 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 √8428 ≈ 91.80. If none of them divides 8428, it is prime.
- 3
2 divides 8428 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 8428 = 2^{2} \times 7^{2} \times 43 \]Testing 8428 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 8428 ÷ 2 | divides exactly (4214) |
| 3 | 8428 ÷ 3 | leaves 1 |
| 5 | 8428 ÷ 5 | leaves 3 |
| 7 | 8428 ÷ 7 | divides exactly (1204) |
| 11 | 8428 ÷ 11 | leaves 2 |
| 13 | 8428 ÷ 13 | leaves 4 |
| 17 | 8428 ÷ 17 | leaves 13 |
| 19 | 8428 ÷ 19 | leaves 11 |
| 23 | 8428 ÷ 23 | leaves 10 |
| 29 | 8428 ÷ 29 | leaves 18 |
| 31 | 8428 ÷ 31 | leaves 27 |
| 37 | 8428 ÷ 37 | leaves 29 |
Questions
Is 8428 a prime number?
No, 8428 is not a prime number. It is divisible by 2: 8428 = 2 × 4214.
What is the next prime after 8428?
8429.
What is the prime number before 8428?
8423.
What are the factors of 8428?
1, 2, 4, 7, 14, 28, 43, 49, 86, 98, 172, 196, 301, 602, 1204, 2107, 4214, 8428.