Which of the first five dynasties lasted the longest

1.Later Liang (June 1, 907–23) (16 years)
2.Later Tang (923–36) (13 years)
3.Later Jin (936–47) (11 years)
4.Later Han (947–51 or 979, depending on whether Northern Han is considered part of the dynasty) (4 years or 32 years)
5.Later Zhou (951–60) (9 years)

These are the first 5 dynasties, so it would be the Later Liang dynasty or the Later Han dynasty if Norther Han was considered to be apart of it.

Countries of eastern europe.