Is 30 a prime number?
No, 30 is not a prime number. It is divisible by 2: 30 = 2 × 15.
Is 30 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 √30 ≈ 5.48. If none of them divides 30, it is prime.
- 3
2 divides 30 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 30 = 2 \times 3 \times 5 \]
Testing 30 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 30 ÷ 2 | divides exactly (15) |
| 3 | 30 ÷ 3 | divides exactly (10) |
| 5 | 30 ÷ 5 | divides exactly (6) |
Questions
Is 30 a prime number?
No, 30 is not a prime number. It is divisible by 2: 30 = 2 × 15.
What is the next prime after 30?
31.
What is the prime number before 30?
29.
What are the factors of 30?
1, 2, 3, 5, 6, 10, 15, 30.