Is 71 a prime number?
Yes, 71 is a prime number. Its only factors are 1 and 71.
Is 71 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 √71 ≈ 8.43. If none of them divides 71, it is prime.
- 3
None of them divides 71, so it is prime.
Testing 71 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 71 ÷ 2 | leaves 1 |
| 3 | 71 ÷ 3 | leaves 2 |
| 5 | 71 ÷ 5 | leaves 1 |
| 7 | 71 ÷ 7 | leaves 1 |
Questions
Is 71 a prime number?
Yes, 71 is a prime number. Its only factors are 1 and 71.
What is the next prime after 71?
73.
What is the prime number before 71?
67.
What are the factors of 71?
1, 71.