gmp-ecm software package provides Factor integers using the Elliptic Curve Method, you can install in your Debian 7 (Wheezy) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install gmp-ecm
gmp-ecm is installed in your system.
Make ensure the gmp-ecm package were installed using the commands given below,
$ sudo dpkg-query -l | grep gmp-ecm *
You will get with gmp-ecm package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | Mathematics |
| Package | gmp-ecm |
| Version | 6.4.2-1 |
| Description | Factor integers using the Elliptic Curve Method |
| Sub Section | math |