Pyramid carbon dating
The radiocarbon dates for the Great Pyramid ranged from 2853 to 3809 BC, which, if reliable, and if assumed to be the date of its construction, would make the Pyramid at least 400 years older than is currently believed.
Radiocarbon dating cannot be applied to stone, but it can be used to date fragments of organic material, such as wood and charcoal, which are sometimes found embedded in the mortar between the stone blocks.
Total, 44 years." We are left guessing whether the XXIV dynasty lasted for 6 years, 44, or 990.
The names and ages Manetho gave for the kings of the two dynasties we know the most about, the eighteenth and nineteenth, were proven wrong in almost every instance when compared with the evidence left by the pharaohs themselves. Breasted to describe Manetho's history as "a late, careless and uncritical compilation, which can be proven wrong from the contemporary monuments in the vast majority of cases, where such monuments have survived.
The first problem with Manetho's dynasties was that the Egyptians left few clues as to which dynasty followed which; they weren't interested in recording which dynasties ended in a revolution and which simply died out.
More serious is that the original text of Manetho is no longer available; what we have are garbled editions quoted by two late Roman writers (Eusebius and Africanus), plus an excerpt from Josephus.
Search for pyramid carbon dating:
Because of the poor condition, piecing the fragments together has proven to be difficult.