5.1.2, 5.1.1, 5.0.5 tar files corrupt?

[knoller19]

This is for linux x64 rpm

$ tar xf LibreOffice_5.1.1_Linux_x86-64_rpm.tar
tar: This does not look like a tar archive
tar: Skipping to next header
tar: Exiting with failure status due to previous errors