Is 7 a prime number?
Yes, 7 is a prime number. Its only factors are 1 and 7.
Is 7 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 ā7 ā 2.65. If none of them divides 7, it is prime.
- 3
None of them divides 7, so it is prime.
Testing 7 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 7 Ć· 2 | leaves 1 |
Questions
Is 7 a prime number?
Yes, 7 is a prime number. Its only factors are 1 and 7.
What is the next prime after 7?
11.
What is the prime number before 7?
5.
What are the factors of 7?
1, 7.