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1871 is the smallest prime factor of (3^171)/2. The Paris Commune of 1871 was the first attempt at a socialist society. 1871!/1781!  1 is prime. [Patterson] The least prime p congruent to 11 mod 12 such that (p1)/2 does not divide the numerator of the Bernoulli number B(p1). [Wesolowski]
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