Largest prime factor of a number

		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 votes170 views1 answer
GetMousebuttonDown unity
C#
32 votes203 views4 answers
Textmesh pro text unity
C#Unity
6 votes197 views1 answer
Unity call function on animation finish
C#Unity
10 votes147 views2 answers
How to set a color of text in unity 2020 script
C#
0 vote151 views1 answer
C# replace crlf
C#
0 vote157 views2 answers
C# list remove by index
C#
0 vote225 views4 answers
Enum in c#
C#
0 vote204 views2 answers
Unity 2d top down movement script
C#Unity
0 vote214 views1 answer
Unity get camera
C#Unity
1 vote253 views1 answer
Unity instantiate with name
C#Unity