Who knows three hundred eleven?
?אחד עשר ושלוש מאות - מי יודע
In the spirit of the song "Echad - mi yodeya", please post interesting and significant Jewish facts about the number 311.
Give up on lazy gematria; this man can't bear it.
Check out mi-yodeya-series for the previous three hundred ten entries in this ongoing series.
Please include sources for your information wherever possible, as with all other answers on this site.