Is 139 a prime number?
Yes, 139 is a prime number. Its only factors are 1 and 139.
Is 139 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 √139 ≈ 11.79. If none of them divides 139, it is prime.
- 3
None of them divides 139, so it is prime.
Testing 139 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 139 ÷ 2 | leaves 1 |
| 3 | 139 ÷ 3 | leaves 1 |
| 5 | 139 ÷ 5 | leaves 4 |
| 7 | 139 ÷ 7 | leaves 6 |
| 11 | 139 ÷ 11 | leaves 7 |
Questions
Is 139 a prime number?
Yes, 139 is a prime number. Its only factors are 1 and 139.
What is the next prime after 139?
149.
What is the prime number before 139?
137.
What are the factors of 139?
1, 139.