Is 340 a prime number?
No, 340 is not a prime number. It is divisible by 2: 340 = 2 × 170.
Is 340 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 √340 ≈ 18.44. If none of them divides 340, it is prime.
- 3
2 divides 340 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 340 = 2^{2} \times 5 \times 17 \]Testing 340 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 340 ÷ 2 | divides exactly (170) |
| 3 | 340 ÷ 3 | leaves 1 |
| 5 | 340 ÷ 5 | divides exactly (68) |
| 7 | 340 ÷ 7 | leaves 4 |
| 11 | 340 ÷ 11 | leaves 10 |
| 13 | 340 ÷ 13 | leaves 2 |
| 17 | 340 ÷ 17 | divides exactly (20) |
Questions
Is 340 a prime number?
No, 340 is not a prime number. It is divisible by 2: 340 = 2 × 170.
What is the next prime after 340?
347.
What is the prime number before 340?
337.
What are the factors of 340?
1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340.