Is 1040 a prime number?
No, 1040 is not a prime number. It is divisible by 2: 1040 = 2 × 520.
Is 1040 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 √1040 ≈ 32.25. If none of them divides 1040, it is prime.
- 3
2 divides 1040 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 1040 = 2^{4} \times 5 \times 13 \]Testing 1040 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 1040 ÷ 2 | divides exactly (520) |
| 3 | 1040 ÷ 3 | leaves 2 |
| 5 | 1040 ÷ 5 | divides exactly (208) |
| 7 | 1040 ÷ 7 | leaves 4 |
| 11 | 1040 ÷ 11 | leaves 6 |
| 13 | 1040 ÷ 13 | divides exactly (80) |
| 17 | 1040 ÷ 17 | leaves 3 |
| 19 | 1040 ÷ 19 | leaves 14 |
| 23 | 1040 ÷ 23 | leaves 5 |
| 29 | 1040 ÷ 29 | leaves 25 |
| 31 | 1040 ÷ 31 | leaves 17 |
Questions
Is 1040 a prime number?
No, 1040 is not a prime number. It is divisible by 2: 1040 = 2 × 520.
What is the next prime after 1040?
1049.
What is the prime number before 1040?
1039.
What are the factors of 1040?
1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040.