what "most scientists" do you mean?
aside from the fact that "most" people any group are mostly wrong most of the time, wikipedia usually defaults to that LCD category and it says the same thing I am seeing in the book -
Wikipedia:
"The Great Pyramid of Giza is the largest Egyptian pyramid and served as the tomb of pharaoh Khufu, who ruled during the Fourth Dynasty of the Old Kingdom. Built in the early 26th century BC, over a period of about 27 years, the pyramid is the oldest of the Seven Wonders of the Ancient World... "
book: 