Dear Doctor: Does man with exceptional memory have rare condition called hyperthymesia?

Dear Doctor: Does man with exceptional memory have rare condition called hyperthymesia?

DEAR DR. ROACH: I am a 76-year-old man. I’ve always had a knack for remembering numbers. Back around 1993 or so, I was given a phone number to call. I’ve called this number once, but I remember the number to this day. When this number was given to me, I knew I would always remember it.