NEW!!! Download Pentium III version of GMP-ECM version 5 for win32 here

NEW!!! Download Pentium IV version of GMP-ECM version 5 for win32 here

Download GMP-ECM version 4c for win32.

Download updated Pentium/Pentium MMX/Pentium Pro version here or Pentium II version here or Pentium III version here

And you can download old Pentium Pro version here

Last binary update : 2004/2/2