Who knows one hundred seventy-one?
Please cite/link your sources, if possible. At some point at least twenty-four hours from now, I will:
Upvote all interesting answers.
Accept the best answer.
Go on to the next number.
According to Rashbam (cited in Tosafos to Avodah Zarah 9b, s.v. האי מאן), the second Beis Hamikdash was destroyed 171 years before the end of the fourth millennium (3829 since Creation).