Hmm ... It's impossible ;-) This RPM doesn't exist on any FTP server

Provides :
config(xorg-x11-xdm)
libXdmGreet.so()(64bit)
xdm
xorg-x11-xdm
xorg-x11-xdm(x86-64)

Requires :

libc.so.6()(64bit)
libpam.so.0(LIBPAM_1.0)(64bit)
config(xorg-x11-xdm) = 1:1.1.6-14.1.el6
libc.so.6(GLIBC_2.3.4)(64bit)
libc.so.6(GLIBC_2.2.5)(64bit)
libX11.so.6()(64bit)
libXdmcp.so.6()(64bit)
pam => 0.78-0
libcrypt.so.1()(64bit)
libXmu.so.6()(64bit)
/bin/sh
rtld(GNU_HASH)
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
libXpm.so.4()(64bit)
libXext.so.6()(64bit)
libpam.so.0()(64bit)
libcrypt.so.1(GLIBC_2.2.5)(64bit)
rpmlib(FileDigests) <= 4.6.0-1
rpmlib(CompressedFileNames) <= 3.0.4-1
xorg-x11-xinit
libXau.so.6()(64bit)
libXaw.so.7()(64bit)
libc.so.6(GLIBC_2.4)(64bit)
libXinerama.so.1()(64bit)
libc.so.6(GLIBC_2.3)(64bit)
rpmlib(PayloadIsXz) <= 5.2-1
libc.so.6(GLIBC_2.11)(64bit)
libdl.so.2(GLIBC_2.2.5)(64bit)
libdl.so.2()(64bit)
libXt.so.6()(64bit)

Content of RPM :
/etc/X11/xdm
/etc/X11/xdm/GiveConsole
/etc/X11/xdm/TakeConsole
/etc/X11/xdm/Xaccess
/etc/X11/xdm/Xreset
/etc/X11/xdm/Xresources
/etc/X11/xdm/Xservers
/etc/X11/xdm/Xsession
/etc/X11/xdm/Xsetup_0
/etc/X11/xdm/Xstartup
/etc/X11/xdm/Xwilling
/etc/X11/xdm/xdm-config
/etc/pam.d/xdm
/usr/bin/xdm
/usr/bin/xdmshell
/usr/lib64/X11/xdm
/usr/lib64/X11/xdm/chooser
/usr/lib64/X11/xdm/libXdmGreet.so
/usr/share/X11
/usr/share/X11/app-defaults/Chooser
/usr/share/doc/xorg-x11-xdm-1.1.6
/usr/share/doc/xorg-x11-xdm-1.1.6/AUTHORS
/usr/share/doc/xorg-x11-xdm-1.1.6/COPYING
/usr/share/doc/xorg-x11-xdm-1.1.6/ChangeLog
/usr/share/doc/xorg-x11-xdm-1.1.6/INSTALL
/usr/share/doc/xorg-x11-xdm-1.1.6/NEWS
/usr/share/doc/xorg-x11-xdm-1.1.6/README
/usr/share/man/man1/xdm.1.gz
/usr/share/xdm
/usr/share/xdm/pixmaps
There is 3 files more in these RPM.