Who knows two hundred eighty-six?
?ששה ושמונים ומאתים - מי יודע
In the spirit of the song "Echad - mi yodeya", please post interesting and significant Jewish facts about the number 286.
In casting about for a lazy gematria for this one, a lot seemed more appropriate for a different time on the calendar.
Check out mi-yodeya-series for the previous two hundred eighty-five entries in this ongoing series.
Please include sources for your information wherever possible, as with all other answers on this site.