Is 679 a prime number?
No, 679 is not a prime number. It is divisible by 7: 679 = 7 × 97.
Is 679 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 √679 ≈ 26.06. If none of them divides 679, it is prime.
- 3
7 divides 679 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 679 = 7 \times 97 \]
Testing 679 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 679 ÷ 2 | leaves 1 |
| 3 | 679 ÷ 3 | leaves 1 |
| 5 | 679 ÷ 5 | leaves 4 |
| 7 | 679 ÷ 7 | divides exactly (97) |
| 11 | 679 ÷ 11 | leaves 8 |
| 13 | 679 ÷ 13 | leaves 3 |
| 17 | 679 ÷ 17 | leaves 16 |
| 19 | 679 ÷ 19 | leaves 14 |
| 23 | 679 ÷ 23 | leaves 12 |
Questions
Is 679 a prime number?
No, 679 is not a prime number. It is divisible by 7: 679 = 7 × 97.
What is the next prime after 679?
683.
What is the prime number before 679?
677.
What are the factors of 679?
1, 7, 97, 679.