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 votes318 views1 answer
C# mysql query
C#
2 votes305 views1 answer
Generate UUID in c#
C#
124 votes562 views6 answers
Git set origin
C#
0 vote298 views1 answer
How to make panel scrollable c#
C#
0 vote345 views1 answer
Unity banner ad C#
C#Unity
1 vote342 views2 answers
How to set layout margin programmatically in android
C#
3 votes334 views1 answer
Create a directory if it doesnt exist c#
C#
0 vote305 views1 answer
C# .net core 3.0 trying Exception The transaction log for database is full due to ACTIVE_TRANSACTION
C#
0 vote321 views1 answer
Unity get rid of mouse
C#
0 vote313 views1 answer
C# create empty file if not exists
C#