Is 279 a prime number?
No, 279 is not a prime number. It is divisible by 3: 279 = 3 × 93.
Is 279 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 √279 ≈ 16.70. If none of them divides 279, it is prime.
- 3
3 divides 279 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 279 = 3^{2} \times 31 \]Testing 279 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 279 ÷ 2 | leaves 1 |
| 3 | 279 ÷ 3 | divides exactly (93) |
| 5 | 279 ÷ 5 | leaves 4 |
| 7 | 279 ÷ 7 | leaves 6 |
| 11 | 279 ÷ 11 | leaves 4 |
| 13 | 279 ÷ 13 | leaves 6 |
Questions
Is 279 a prime number?
No, 279 is not a prime number. It is divisible by 3: 279 = 3 × 93.
What is the next prime after 279?
281.
What is the prime number before 279?
277.
What are the factors of 279?
1, 3, 9, 31, 93, 279.