Prime number algorithm

Prime number checking algorithm

def is_prime(n: int) -> bool:
    """Primality test using 6k+-1 optimization."""
    if n <= 3:
        return n > 1
    if n % 2 == 0 or n % 3 == 0:
        return False
    i = 5
    while i ** 2 <= n:
        if n % i == 0 or n % (i + 2) == 0:
            return False
        i += 6
    return True

Source: en.wikipedia.org

Prime number algorithm

bool IsPrime(int n)
{
    if (n == 2 || n == 3)
        return true;

    if (n <= 1 || n % 2 == 0 || n % 3 == 0)
        return false;

    for (int i = 5; i * i <= n; i += 6)
    {
        if (n % i == 0 || n % (i + 2) == 0)
            return false;
    }
    return true;
}

Source: en.wikipedia.org

Similar codes

4 votes238 views2 answers
OpenFileDialog c#
C#
0 vote236 views1 answer
Unity position ui element
C#Unity
0 vote250 views1 answer
"??" in C#
C#
1 vote226 views3 answers
C# datagridview color header
C#
0 vote211 views1 answer
How to detect when a gameobject has exited a trigger c#
C#
45 votes236 views5 answers
Messagebox error c#
C#
0 vote265 views1 answer
Set dirty a property unity custom inspector
C#
0 vote257 views1 answer
C# datafield change cell background color
C#
13 votes225 views5 answers
C# list to string
C#
0 vote243 views1 answer
Max value data annotation c#
C#