Is 111 a prime number?
No, 111 is not a prime number. It is divisible by 3: 111 = 3 × 37.
Is 111 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 √111 ≈ 10.54. If none of them divides 111, it is prime.
- 3
3 divides 111 exactly, so it is not prime. Its prime factorisation is
LaTeX source of the formulas on this page
\[ 111 = 3 \times 37 \]
Testing 111 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 111 ÷ 2 | leaves 1 |
| 3 | 111 ÷ 3 | divides exactly (37) |
| 5 | 111 ÷ 5 | leaves 1 |
| 7 | 111 ÷ 7 | leaves 6 |
Questions
Is 111 a prime number?
No, 111 is not a prime number. It is divisible by 3: 111 = 3 × 37.
What is the next prime after 111?
113.
What is the prime number before 111?
109.
What are the factors of 111?
1, 3, 37, 111.