The Egyptologist David Henige states while there have been examples of kinglists where rulers were ascribed reigns as long as that assigned to Pepi II, "often exceeding 100 years, but these are invariably rejected as mythical", the problems inherent in dating Pepi II's reign are many since:...a hyperextended duration Pepi II's reign is not really necessary to bring Old Kingdom chronology into some equilibrium with other chronologies. For Mesopotamia from at least this early until virtually the Persian conquest, numerous localized synchronisms play vital roles in absolute dating, but seldom affect the duration of individual dynasties. Not only is Old Kingdom Egypt well outside any "synchronism zone" but, as it happens, since Pepy was the last substantive ruler of Egypt before a period of political and chronological chaos...there are no awkward ramifying effects by reducing his reign by twenty or thirty years, a period that can simply be added on to the First Intermediate Period.Henige himself is somewhat skeptical of the 94 year figure assigned to Pepi II and follows Naguib Kanawati's 2003 suggestion that this king's reign was most probably much shorter than 94 years.