Firstly, its almost impossible. A primordial black hole would have to migrate into the center of the sun for there to be any way to pull that much of the sun's mass into the core. If that happened and our star exploded, then in 8 minutes, everything on Earth, above water and facing the sun. would be instantly vaporized. Those on the dark side of the earth would be roasted by a superheated atmosphere soon thereafter. It would look really cool from The outer planets though.