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Perfect Numbers
Multiply Perfect Numbers
Multiply Perfect Numbers
Jlpe's Number Recreations Page
Holdener, Judy
Voight, John
Odd Perfect Numbers - Missing Values
Perfect Numbers
On a Generalization of Perfect Numbers
The Perfect Number Journey
Cubes of Perfection
A detailed history of the quest for perfect numbers, from Euclid to their present-day Mersenne discoveries.
www-history.mcs.st-and.ac.uk/history/HistTopics/Perfect_numbers.html Science: Math: Number Theory: Factoring: Perfect Numbers
Up-to-date information on multiperfect numbers and searchable database maintained by Achim Flammenkamp.
wwwhomes.uni-bielefeld.de/achim/mpn.html Science: Math: Number Theory: Factoring: Perfect Numbers
Over 2000 multiperfect numbers sorted by numerical value and by factorisation.
-- ftp://ftp.cs.arizona.edu/xkernel/rcs/mpfn.html Science: Math: Number Theory: Tables
Features original number recreations by the author, such as generalized perfect numbers, digital diversions, diophantine equations, didactic numbers, and number theory.
www.geocities.com/windmill96/numrecreations.html Science: Math: Recreations
Kenyon College. Odd perfect numbers; theoretical morphology. Teaching technology, GAP projects.
www2.kenyon.edu/People/holdenerj/ Science: Math: Number Theory: People: H
University of California, Berkeley. Quadratic forms, perfect numbers.
math.berkeley.edu/~jvoight/ Science: Math: Number Theory: People: V
Status of various factorisations that would extend the known area of non-existence of odd perfect numbers, by Kevin Hare.
www.math.uwaterloo.ca/~kghare/ODDPERFECT/MissingValues.html Science: Math: Number Theory: Factoring: Perfect Numbers
Harry J. Smith's pages of the mathematics behind perfect numbers, aliquot sequences and Mersenne numbers. Includes program listings and e-mail archives.
www.geocities.com/hjsmithh/Perfect.html Science: Math: Number Theory: Factoring: Perfect Numbers
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.
www.geocities.com/windmill96/fperfect/fperfect.html Science: Math: Number Theory: Factoring: Perfect Numbers
A Mathematics Enrichment Workshop introducing perfect numbers. Lessons and exercises extend over several pages. Aimed at interested middle and high school students.
home1.pacific.net.sg/~novelway/MEW2/lesson1.html Science: Math: Number Theory: Factoring: Perfect Numbers
From Ivars Peterson's MathTrek column in MAA Online. Curious relationships satisfied by perfect numbers.
www.maa.org/mathland/mathtrek_5_18_98.html Science: Math: Number Theory: Factoring: Perfect Numbers