Is 187 a prime number?
No, 187 is not a prime number. It is divisible by 11: 187 = 11 × 17.
Is 187 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 √187 ≈ 13.67. If none of them divides 187, it is prime.
- 3
11 divides 187 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 187 = 11 \times 17 \]
Testing 187 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 187 ÷ 2 | leaves 1 |
| 3 | 187 ÷ 3 | leaves 1 |
| 5 | 187 ÷ 5 | leaves 2 |
| 7 | 187 ÷ 7 | leaves 5 |
| 11 | 187 ÷ 11 | divides exactly (17) |
| 13 | 187 ÷ 13 | leaves 5 |
Questions
Is 187 a prime number?
No, 187 is not a prime number. It is divisible by 11: 187 = 11 × 17.
What is the next prime after 187?
191.
What is the prime number before 187?
181.
What are the factors of 187?
1, 11, 17, 187.