Is 61 a prime number?
Yes, 61 is a prime number. Its only factors are 1 and 61.
Is 61 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 √61 ≈ 7.81. If none of them divides 61, it is prime.
- 3
None of them divides 61, so it is prime.
Testing 61 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 61 ÷ 2 | leaves 1 |
| 3 | 61 ÷ 3 | leaves 1 |
| 5 | 61 ÷ 5 | leaves 1 |
| 7 | 61 ÷ 7 | leaves 5 |
Questions
Is 61 a prime number?
Yes, 61 is a prime number. Its only factors are 1 and 61.
What is the next prime after 61?
67.
What is the prime number before 61?
59.
What are the factors of 61?
1, 61.