Hello
Congratulations on the negative RPR test. Not entirely sure why you tested for syphilis as in your previous description you talked about an exposure 10 years ago with a woman having cervical cancer (that you suspected was caused by HPV)
There really is no HPV test, but as advice by auntijessi HPV usually clears your body in about 2 years if you did catch it. You shouldn't worry about HPV now.
Also, just like auntijessi mentioned, that your friend died of cervical cancer doesn't mean she got it from an HPV strain/STD. It could be genetic/hereditary, environmental.
Continue to stay STD negative, but continue to stay with a positive attitude in life.
Regards,