The last gaon of Sura was Samuel ben Hofni , who died in 1034 ; the last gaon of Pumbedita was Hezekiah Gaon , who was tortured to death in 1040 ; .
The activity of the Geonim covers a period of nearly 450 years .
The last gaon of Sura was Samuel ben Hofni , who died in 1034 ; the last gaon of Pumbedita was Hezekiah Gaon , who was tortured to death in 1040 ; hence the activity of the Geonim covers a period of nearly 450 years .