엄청 큰수를 계산

출처 : http://cafe.naver.com/gogoomas/244870

System.Numerics 참조추가합니다

Imports System.Numerics

Public Class Form1

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

        Dim st = New Stopwatch()

        st.Start()

        Dim a As BigInteger = 1

        For abc = 1 To 10000

            a *= abc

        Next

        MsgBox(st.ElapsedMilliseconds / 1000)

        TextBox1.Text = a.ToString

    End Sub

End Class

MSDN참고 : http://msdn.microsoft.com/ko-kr/library/system.numerics.biginteger.aspx