Packages with the ecm use flag

sci-libs / symengine : Fast symbolic manipulation library, written in C++

  • Add support for ECM integer factorization library (sci-mathematics/gmp-ecm)

sci-mathematics / giac : A free C++ Computer Algebra System library and its interfaces

  • Enable the use of sci-mathematics/gmp-ecm

sci-mathematics / msieve : A C library implementing a suite of algorithms to factor large integers

  • Enable support for the GMP-ECM library