Is 2018 a prime number?
No, 2018 is not a prime number. It is divisible by 2: 2018 = 2 × 1009.
Is 2018 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 √2018 ≈ 44.92. If none of them divides 2018, it is prime.
- 3
2 divides 2018 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 2018 = 2 \times 1009 \]
Testing 2018 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 2018 ÷ 2 | divides exactly (1009) |
| 3 | 2018 ÷ 3 | leaves 2 |
| 5 | 2018 ÷ 5 | leaves 3 |
| 7 | 2018 ÷ 7 | leaves 2 |
| 11 | 2018 ÷ 11 | leaves 5 |
| 13 | 2018 ÷ 13 | leaves 3 |
| 17 | 2018 ÷ 17 | leaves 12 |
| 19 | 2018 ÷ 19 | leaves 4 |
| 23 | 2018 ÷ 23 | leaves 17 |
| 29 | 2018 ÷ 29 | leaves 17 |
| 31 | 2018 ÷ 31 | leaves 3 |
| 37 | 2018 ÷ 37 | leaves 20 |
Questions
Is 2018 a prime number?
No, 2018 is not a prime number. It is divisible by 2: 2018 = 2 × 1009.
What is the next prime after 2018?
2027.
What is the prime number before 2018?
2017.
What are the factors of 2018?
1, 2, 1009, 2018.