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 vote184 views1 answer
C# caractère cacher mot de passe
C#
2 votes231 views1 answer
Unity rotate around pivot c#
C#Unity
0 vote204 views2 answers
Streamwriter c#
C#
2 votes194 views1 answer
Unity destroy object on collision
C#
0 vote264 views1 answer
Unity Interstitial ad C#
C#Unity
0 vote210 views1 answer
C# .net stringify data query
C#
0 vote211 views2 answers
Unity timer
C#Unity
2 votes231 views1 answer
Move to another scene unity
C#Unity
0 vote215 views1 answer
C# string replace comma with newline
C#
27 votes233 views2 answers
Unity check if gameobject is active
C#Unity