Now, the dictionary definition of hail mary is:
a long forward pass in football thrown into or near the end zone in a last-ditch attempt to score as time runs out —often used figuratively
https://www.merriam-webster.com/dictionary/Hail%20Mary
By this definition, it does appear that this was a hail mary. But my understood definition of hail mary always includes a degree of uncertainty as to who your target is -- just throw it into a crowd and hope that someone wearing your jersey comes down with it. That did not happen here. Franks saw an open man, threw a bomb, and hit him perfectly in stride into the end zone.
So I leave it to you good people: was this a hail mary?