Wectar - Science - Math - Number Theory - Factoring - Perfect Numbers

	submit a site to this category

Subcategories
Mersenne@

	Aliquot Sequences URL: http://www.aliquot.de/aliquote.htm ODP description: Statistics by Wolfgang Creyaufmueller, including many tables and links to factoring sites and software. Page title: ALIQUOT PAGE - Prime families - Primzahlfamilien Page description: To proof Catalans conjecture needs many aliquot sequences. The programmes (download) factorize up to 120 digits.
	Tables of Aliquot Cycles URL: http://amicable.homepage.dk/tables.htm ODP description: Data for various kinds up to 10^12, including unitary, infinitary, exponential, augmented and reduced varieties.
	Aliquot Sequences URL: http://www.loria.fr/~zimmerma/records/aliquot.html ODP description: Results and software from Paul Zimmermann, addressing the Catalan Conjecture and working on the difficult "Lehmer Five" sequences.
	Aliquot Sequences URL: http://www.math.ru.nl/~bosma/research/nuth/ali.html ODP description: Aliquot sequences arise in iterating the sum-of-divisors function s. Bosma has calculated tables up to start value 50,000 and 80 digits.
	Amicable Numbers URL: http://www.shyamsundergupta.com/amicable.htm ODP description: Observations on amicable pairs and their distribution, including Harshad and Happy Amicable pairs. Page title: Amicable Numbers by Shyam Sunder Gupta
	Aliquot Sequences URL: http://www.unirioja.es/dptos/dmc/jvarona/aliquot.html ODP description: Juan L. Varona's work on aliquot sequences examines sequences with start values up to 10000, and traces them to large composite values. Page title: Aliquot sequences
	Aliquot URL: http://christophe.clavier.free.fr/Aliquot/site/Aliquot.html ODP description: Sequences with initial term up to 10,000, by Christophe Clavier. Page title: Aliquot sequences (with leading terme < 10,000)
	Cubes of Perfection URL: http://www.maa.org/mathland/mathtrek_5_18_98.html ODP description: From Ivars Peterson's MathTrek column in MAA Online. Curious relationships satisfied by perfect numbers. Page title: Ivars Peterson's MathTrek - Cubes of Perfection
	Perfect Numbers URL: http://www.geocities.com/hjsmithh/Perfect.html ODP description: Harry J. Smith's pages of the mathematics behind perfect numbers, aliquot sequences and Mersenne numbers. Includes program listings and e-mail archives. Page title: Perfect Numbers -- from Harry J. Smith
	Multiply Perfect Numbers URL: http://wwwhomes.uni-bielefeld.de/achim/mpn.html ODP description: Up-to-date information on multiperfect numbers and searchable database maintained by Achim Flammenkamp.
	Perfect Numbers URL: http://www-history.mcs.st-and.ac.uk/history/HistTopics/Perfect_numbers.html ODP description: A detailed history of the quest for perfect numbers, from Euclid to their present-day Mersenne discoveries. Page title: Perfect numbers
	Perfect Number - from MathWorld URL: http://mathworld.wolfram.com/PerfectNumber.html ODP description: Definitions and references. Page title: Perfect Number -- from Wolfram MathWorld
	On a Generalization of Perfect Numbers URL: http://www.geocities.com/windmill96/fperfect/fperfect.html ODP description: J. L. Pe introduces perfect numbers relative to an arithmetical function f. Under this scheme, the usual perfect numbers are just one among many species of "f-perfect numbers". Several open problems and examples of perfect number sets are given, as well as a few f-amicable pairs.