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 vote132 views1 answer
Oauth API with the Access Token to retrieve some of users information.
C#
0 vote122 views1 answer
.net entities query multiple join condition
C#
1 vote110 views1 answer
C# for loop increment by 2
C#
1 vote114 views1 answer
C# reflection resize array
C#
0 vote123 views1 answer
Itext7 c# memorystream
C#
0 vote126 views1 answer
C# sprintf equivalent
C#
4 votes143 views1 answer
Unity spherecast
C#
0 vote128 views1 answer
C# how to start an application and detect if started
C#
0 vote156 views1 answer
Unity stop all audio
C#Unity
0 vote174 views1 answer
Iterate though data in firebase unity
C#Unity