The sixth challenge of the 2022 Series will be a 3-day challenge celebrating the 196th birthday of the German mathematician Bernhard Riemann. The challenge will be offered on the WW application, beginning 17 September 20:00 UTC and ending 20 September 20:00 UTC. To participate in the Challenge, please select only the Wieferich and Wall-Sun-Sun Prime Search (WW) project in your PrimeGrid preferences section. Issues? Inquiries? Interjections? Join the discussion at https://www.primegrid.com/forum_thread.php?id=9993&nowrap=true#156946

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