you've got a srouce (src) package there, so you wouldn't want to use that if possible, you'd want a presompiled rpm.
If you had to build that pacakge from source, you'd acutally want
rpm -ta primer3-0.9.1.gcc.src.rpm
rpm -tb primer3-0.9.1.gcc.src.rpm
not -i as that is only to install the files, not do anythign with them, like the source would require