Achad Asar Ushlosh Meyot - mi yodeya?

Question

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.

Answer 1

http://www.ou.org/torah/tt/5762/shavuot62/print.htm

Parshas Naso is indisputably the longest Sedra, however you count length; is most commonly written on 311 lines in a Sefer Torah (7.4 cols)