Search The Directory The Web for Home > Science > Math > Number Theory > Divisibility > Perfect_Numbers New! Submit a site   Categories: Mersenne *(10)       whatUseek Collection Sites (submit a site ):   Give your site great placement in this category in as little as two business days!     whatUseek Directory Site Listings:   Aliquot Sequences - Statistics by Wolfgang Creyaufmueller, including many tables and links to factoring sites and software.   Aliquot Sequences - Statistics by Wolfgang Creyaufmueller, including many tables and links to factoring sites and software.   Aliquot Sequences - Statistics by Wolfgang Creyaufmueller, including many tables and links to factoring sites and software.   Aliquot Sequences - Statistics by Wolfgang Creyaufmueller, including many tables and links to factoring sites and software.   Cubes of Perfection - From Ivars Peterson's MathTrek column in MAA Online. Curious relationships satisfied by perfect numbers.   John Voight - Includes his thesis on the nonexistence or otherwise of odd perfect numbers and the use of continued fraction methods.   Multiperfect Number Search - Sources and binaries of Jason Moxham's searching software.   Multiply Perfect Numbers - Up-to-date information on multiperfect numbers and searchable database maintained by Achim Flammenkamp.   Perfect Numbers - A detailed history of the quest for perfect numbers, from Euclid to their present-day Mersenne discoveries.   Perfect Numbers - A detailed history of the quest for perfect numbers, from Euclid to their present-day Mersenne discoveries.   Perfect, Amicable and Sociable Numbers - Definitions, links and references of various applications of the sum of divisors function s(n).   Tables of Aliquot Cycles - Data for various kinds up to 10^12, including unitary, infinitary, exponential, augmented and reduced varieties.   The Perfect Number Journey - A Mathematics Enrichment Workshop introducing perfect numbers. Lessons and exercises extend over several pages. Aimed at interested middle and high school students. Help build the largest human-edited directory on the web.   Submit a Site - Open Directory Project - Become an Editor

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