The Giza Pyramid Facts and ?'s

[1deki]

A total of over 2,300,000 (or only 590,712 blocks) of limestone and granite were used in its construction with the average block weighing 2.5 tons and none weighing less than 2 tons.

Construction time (Estimated): 20 years.

lets say there are 'only' 590,712 blocks
20 years equals 10,512,000 minutes
that means it took 17,7 minutes per block 'Egyptians' to aquire material, carve the block, drag it, place it perfectly in its place (those EG torches must have burnt bright in those days..I mean nights). and that kept on for another 20 years during which time their crops were nurtured by....(Ra probably )? probably that's why they hadn't had time to write anything down.
Herodotus is not the best source when it comes to pyramids construction.