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

4 votes325 views1 answer
F string C#
C#
2 votes378 views2 answers
Unity don't destroy on load
C#Unity
0 vote370 views1 answer
How to write boolean condition in if statement at c#
C#
1 vote396 views1 answer
C# unity choose key input
C#Unity
10 votes317 views1 answer
Change height of rect transform unity
C#
0 vote342 views1 answer
How to assign list int for method parameter in C#
C#
0 vote380 views1 answer
Open website c#
C#
0 vote335 views1 answer
Unity callback
C#
0 vote338 views1 answer
Create iis website programmatically c#
C#
0 vote321 views2 answers
Change object material unity
C#