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

2 votes52 views1 answer
C# getasynckeystate mouse
C#
7 votes135 views2 answers
Unity move character
C#
-1 vote111 views1 answer
How to check if time is between two timespans in c#
C#
0 vote99 views1 answer
C# struct
C#
1 vote104 views1 answer
Spawn coins randomli in the camera unity 2d
C#
0 vote97 views1 answer
If statement in razor using "?" and ":"
C#
4 votes99 views1 answer
Print content of array c#
C#
1 vote114 views1 answer
C# multiple button click event to password textbox
C#
4 votes94 views2 answers
C# get desktop path
C#
0 vote100 views1 answer
Ado stands for
C#