September 2017 Update

Task/Prime-decomposition/Batch-File/prime-decomposition.bat

@@ -0,0 +1,25 @@
+@echo off
+::usage: cmd /k primefactor.cmd number
+setlocal enabledelayedexpansion
+
+set /a compo=%1
+if "%compo%"=="" goto:eof
+set list=%compo%= (
+
+set /a div=2 & call :loopdiv
+set /a div=3 & call :loopdiv
+set /a div=5,inc=2
+
+:looptest
+call :loopdiv
+set /a div+=inc,inc=6-inc,div2=div*div
+if %div2% lss %compo% goto looptest
+if %compo% neq 1 set list= %list% %compo%
+echo %list%)   & goto:eof
+
+:loopdiv
+set /a "res=compo%%div
+if %res% neq 0 goto:eof
+set list=%list% %div%,
+set/a compo/=div
+goto:loopdiv