Is 73 a prime number?
Yes, 73 is a prime number. Its only factors are 1 and 73.
Is 73 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 √73 ≈ 8.54. If none of them divides 73, it is prime.
- 3
None of them divides 73, so it is prime.
Testing 73 by the primes up to its square root
| Prime | Division | Result |
|---|---|---|
| 2 | 73 ÷ 2 | leaves 1 |
| 3 | 73 ÷ 3 | leaves 1 |
| 5 | 73 ÷ 5 | leaves 3 |
| 7 | 73 ÷ 7 | leaves 3 |
Questions
Is 73 a prime number?
Yes, 73 is a prime number. Its only factors are 1 and 73.
What is the next prime after 73?
79.
What is the prime number before 73?
71.
What are the factors of 73?
1, 73.