Is 800 a prime number?
No, 800 is not a prime number. It is divisible by 2: 800 = 2 × 400.
Is 800 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 √800 ≈ 28.28. If none of them divides 800, it is prime.
- 3
2 divides 800 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 800 = 2^{5} \times 5^{2} \]Testing 800 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 800 ÷ 2 | divides exactly (400) |
| 3 | 800 ÷ 3 | leaves 2 |
| 5 | 800 ÷ 5 | divides exactly (160) |
| 7 | 800 ÷ 7 | leaves 2 |
| 11 | 800 ÷ 11 | leaves 8 |
| 13 | 800 ÷ 13 | leaves 7 |
| 17 | 800 ÷ 17 | leaves 1 |
| 19 | 800 ÷ 19 | leaves 2 |
| 23 | 800 ÷ 23 | leaves 18 |
Questions
Is 800 a prime number?
No, 800 is not a prime number. It is divisible by 2: 800 = 2 × 400.
What is the next prime after 800?
809.
What is the prime number before 800?
797.
What are the factors of 800?
1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 160, 200, 400, 800.