Is 1340 a prime number?
No, 1340 is not a prime number. It is divisible by 2: 1340 = 2 × 670.
Is 1340 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 √1340 ≈ 36.61. If none of them divides 1340, it is prime.
- 3
2 divides 1340 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 1340 = 2^{2} \times 5 \times 67 \]Testing 1340 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 1340 ÷ 2 | divides exactly (670) |
| 3 | 1340 ÷ 3 | leaves 2 |
| 5 | 1340 ÷ 5 | divides exactly (268) |
| 7 | 1340 ÷ 7 | leaves 3 |
| 11 | 1340 ÷ 11 | leaves 9 |
| 13 | 1340 ÷ 13 | leaves 1 |
| 17 | 1340 ÷ 17 | leaves 14 |
| 19 | 1340 ÷ 19 | leaves 10 |
| 23 | 1340 ÷ 23 | leaves 6 |
| 29 | 1340 ÷ 29 | leaves 6 |
| 31 | 1340 ÷ 31 | leaves 7 |
Questions
Is 1340 a prime number?
No, 1340 is not a prime number. It is divisible by 2: 1340 = 2 × 670.
What is the next prime after 1340?
1361.
What is the prime number before 1340?
1327.
What are the factors of 1340?
1, 2, 4, 5, 10, 20, 67, 134, 268, 335, 670, 1340.