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Riesel number
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==External links== * [http://www.primegrid.com PrimeGrid] * [http://www.prothsearch.com/rieselprob.html The Riesel Problem: Definition and Status] * [http://primes.utm.edu/glossary/xpage/RieselNumber.html The Prime Glossary: Riesel number] * [http://www.prothsearch.com/riesel2.html List of primes of the form: k*2^n-1, k<300] * [https://web.archive.org/web/20210715115849/http://www.15k.org/riesellist.html List of primes of the form: k*2^n-1, k<300, Project Riesel Prime Search] * [https://www.rieselprime.de/ Riesel and Proth Prime Database] {{Classes of natural numbers}} {{DEFAULTSORT:Riesel Number}} [[Category:Analytic number theory]] [[Category:Unsolved problems in number theory]] [[Category:Prime numbers]]
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