The Seventh Dynasty (Dynasty VII)
According to Africanus:
Ἑβδόμη δυναστεία Μεμφιτῶν βασιλέων ό, οἳ ἐβασίλευσαν ἡμέρας οʹ.
"70 kings of the Seventh Dynasty of Memphis ruled for 70 days"
According to Eusebius:
Ἑβδόμη δυναστεία Μεμφιτῶν βασιλέων πέντε, οἳ ἐβασίλευσαν ἡμέρας οεʹ.
"5 kings of the Seventh Dynasty of Memphis ruled for 75 days"
Due to a complete lack of attestations and the instability of the First Intermediate Period, the Seventh Dynasty is normally combined with the Eight Dynasty.