Resultados: [ircuh at devel:~]$ time ./prueba 99999999 1 real 2m18.353s user 2m18.315s sys 0m0.015s [ircuh at devel:~]$ time ./prueba 99999999 2 real 1m41.474s user 1m41.429s sys 0m0.013s URL para ver el código fuente: http://devel.redhispana.org/prueba.c