Largest prime factor

		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 vote147 views1 answer
Wpf background color
C#
0 vote147 views1 answer
Asp net mvc convert ienumerable to selectlistitem
C#
0 vote177 views1 answer
How to detect when a gameobject has exited a trigger c#
C#
-1 vote149 views1 answer
How to create a random vector2 in unity
C#
0 vote139 views1 answer
Sort array dotnet
C#
21 votes196 views3 answers
How to change the scale of a gameobject in unity
C#Unity
0 vote207 views1 answer
How to list all registered users asp net
C#
2 votes140 views1 answer
Regex replace all special characters
C#
2 votes145 views2 answers
C# clear a textbox
C#
1 vote144 views1 answer
C# append multiline textbox
C#