Prime factor largest

		static long LargestFactor(long n)
        {
            long lastFactor;
            if (n%2==0)
            {
                lastFactor = 2;
                n/=2;
                while (n % 2 == 0)
                    n/=2;
            }
            else
            {
                lastFactor = 1;
            }
            long factor = 3;
            long maxFactor = Convert.ToInt64(Math.Sqrt(n));
            while (n > 1 && factor <= maxFactor)
            {
                if(n % factor == 0)
                {
                    n/=factor;
                    lastFactor=factor;
                    while (n % factor == 0)
                        n/= factor;
                    maxFactor = Convert.ToInt64(Math.Sqrt(n));
                }
                factor += 2;
            }
            if (n == 1)
                return lastFactor;
            else
                return n;
        }

Source: icodeblock.blogspot.com

Similar codes

0 vote247 views2 answers
Show title combox check box wpf
C#
0 vote140 views1 answer
Dotween do rotate on one axis
C#
1 vote143 views2 answers
C# merge two xml files
C#
28 votes175 views2 answers
Asp.net format datetime
C#
0 vote170 views1 answer
Browser folder in wpf
C#
40 votes153 views5 answers
C# foreach dictionary
C#
0 vote137 views1 answer
C# check if file hast content
C#
0 vote131 views1 answer
Windows forms webbrowser goforward
C#
2 votes143 views2 answers
Commenting on C#
C#
3 votes706 views6 answers
Capitalize first letter c#
C#