Who knows two hundred ninety-one?
?אחד ותשעים ומאתים - מי יודע
In the spirit of the song "Echad - mi yodeya", please post interesting and significant Jewish facts about the number 291.
I'll bet you can land something interesting from the lazy gematria this time.
Check out mi-yodeya-series for the previous two hundred ninety entries in this ongoing series.
Please include sources for your information wherever possible, as with all other answers on this site.