Prime number or not.

Prime number or not.

[Description]
A prime number is a natural number that can be divided only by 1, or itself.
A prime number is also a natural number that has two divisors.

You can know that the number (less than 10000) is prime number or not.
- Prime number
- Goldbach's conjecture
- Integer factorization

For example, is as follows.
----------------------------------------
1: is not prime number.
2: Prime number. (1)
3: Prime number. (2)
4: 2 + 2
5: Prime number. (3)
6: 3 + 3
7: Prime number. (4)
8: 3 + 5
9: (3 × 3)
10: 3 + 7, 5 + 5
----------------------------------------

[Contents]
+ prime numbers less than 10000
- prime numbers less than 1000
- prime numbers greater than 1000, less than 2000
- prime numbers greater than 2000, less than 3000
- prime numbers greater than 3000, less than 4000
- prime numbers greater than 4000, less than 5000
- prime numbers greater than 5000, less than 6000
- prime numbers greater than 6000, less than 7000
- prime numbers greater than 7000, less than 8000
- prime numbers greater than 8000, less than 9000
- prime numbers greater than 9000, less than 10000
- prime numbers greater than 10000, less than 10009