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	The Prime Pages - http://primes.utm.edu/ Prime number research, records and resources. Includes largest known primes, finding and proving primes, glossary, curios, links.
	Hardy-Littlewood Constants - http://pauillac.inria.fr/algo/bsolve/constant/hrdyltl/hrdyltl.html Infinite series over primes are the main topic in Hadamard-de la Vallée Poussin constants and in Brun's constant.
	Electronic Frontier Foundation: Cooperative Computing Awards - http://www.eff.org/awards/coop.php Offers $100000, $150000 and $250000 for the first discovery of a prime above 10, 100 and 1000 million digits.
	MathWorld: Prime Numbers - http://mathworld.wolfram.com/topics/PrimeNumbers.html Index to hundreds of prime-related articles in Eric Weisstein's MathWorld.
	Prime k-tuplets - http://anthony.d.forbes.googlepages.com/ktuplets.htm Tony Forbes' extensive collection of special types of prime clusters.

	Thomas R. Nicely - http://www.trnicely.net Includes twin prime counts, tables of first occurrence prime gaps, papers.
	Ask Dr. Math FAQ: Prime Numbers - http://mathforum.org/dr.math/faq/faq.prime.num.html Archived questions and answers at different levels.
	The Prime Puzzles & Problems Connection - http://www.primepuzzles.net/ Carlos Rivera's collection of problems and puzzles related to prime numbers.
	Visualizing the Distribution of Prime Numbers - http://yoyo.cc.monash.edu.au/~bunyip/primes/ Investigation into patterns in the distribution of the primes by visualizing them.
	Wikipedia: Prime Numbers - http://en.wikipedia.org/wiki/Category:Prime_numbers Index to many prime-related articles.

	MacTutor History of Mathematics: Prime Numbers - http://www-groups.dcs.st-and.ac.uk/~history/HistTopics/Prime_numbers.html Includes biographies on many mathematicians.
	Introduction to Twin Primes and Brun's Constant - http://numbers.computation.free.fr/Constants/Primes/twin.html An article by Pascal Sebah with the results of computation of the twin primes up to 5.10^15.
	On-Line Encyclopedia of Integer Sequences (OEIS): Primes - http://www.research.att.com/~njas/sequences/Sindx_Pri.html Index to information about many integer sequences involving primes. Site includes numerous other prime-related sequences.
	The Prime Machine - http://www.math.utah.edu/~alfeld/math/machine.html Explore interactively the Goldbach conjecture, the distribution of prime twins, the prime number theorem.
	Animation of Eratosthenes' Prime Sieve - http://www.hbmeyer.de/eratosiv.htm An interactive animation of the sieve of Eratosthenes to obtain prime numbers (JavaScript required).

	Patterns in Primes - http://www.geocities.com/~harveyh/primes.htm Examples of mostly digit patterns collected by Harvey Heinz.
	K-Tuple Permissible Patterns - http://www.opertech.com/primes/k-tuples.html Findings using an exhaustive search by Thomas J Engelsma.
	Notes and Literature on Prime Numbers - http://www.math.utah.edu/~alfeld/math/prime.html With applets to demonstrate properties of primes.
	Henri Lifchitz - http://ourworld.compuserve.com/homepages/hlifchitz/ Research in number theory, prime numbers and parity of arithmetic functions. Includes primality testing theorems and prime number chains. In English and French.
	Prime Numbers Generator and Checker - http://www.numberempire.com/primenumbers.php Enter a natural number, check it and find the nearest prime.

	Status of Search for Multifactorial Primes - http://www.geocities.com/kradenken/ An organized search for primes of the form (n)(n-k)(n-2k)...+/-1. Includes table of numbers searched and primes found.
	Generalized Woodall Numbers - http://science.kennesaw.edu/~jdemaio/generali.htm An organized search for primes of the form n*b^n-1.
	Number Spiral - http://www.numberspiral.com/ Explains this method of visually representing the distribution of primes and the relationships between factors and products.
	The Time Traveler - http://www.geocities.com/timeparadox/ A group with new propositions in various areas of number theory.
	World of Numbers: World of Palindromic Primes - http://www.worldofnumbers.com/palpri.htm Records, statistics, curios and puzzles about primes reading the same backwards. Compiled by Patrick De Geest.

	Prime Numbers and Factoring - http://www.ontko.com/~rayo/primes/index.html Links and references related to primes and factoring.
	Natural Numbers - http://www.naturalnumbers.org Provides a collection of tools and interesting pages for testing, visualizing, and understanding natural numbers.
	Cunningham Chain Records - http://users.cybercity.dk/~dsl522332/math/Cunningham_Chain_records.htm Sequences of nearly doubled primes, maintained by Dirk Augustin.
	Some Prime Numbers - http://www.rsok.com/~jrm/printprimes.html Sieves and factoring for small numbers. Download primes below 8 billion.
	Generalized Fermat Prime Search - http://pagesperso-orange.fr/yves.gallot/primes/gfn.html Software, results and other resources.

	The Nine and Ten Primes Project - http://members.aon.at/toplicm/cp09.html The discovery of nine and finally ten consecutive primes in arithmetic progression.
	Prime Numbers List - http://www.prime-numbers.org Browse all prime numbers of less than 10 digits. A prime number checker facility is also included.
	Jens Kruse Andersen - http://users.cybercity.dk/~dsl522332/ Prime constellation records. Arithmetic progressions, simultaneous primes, prime gaps.
	The First 5,800,000 Prime Numbers - http://www.geocities.com/primes_r_us/ Site includes known primes k*2^n-1 for k=301 to 999.
	Formulae for Primes - http://www.bath.ac.uk/~ensab/Primes/ Includes a formula by Jones, Sato, Wada and Wiens. The set of primes is the set of positive values taken by this expression.

	Bipeds and Prime Numbers - http://www.ucc.ie/opa/conferspech/gbarden.html Graduation address by former professor of philosophy Garrett Barden. Mentions primes as sign of human curiosity.
	Primality Testing with Fermat's Little Theorem - http://www.math.fau.edu/Richman/carm.htm Test numbers for primality and pseudoprimality in Java.
	Are the Prime Numbers Randomly Distributed? - http://www.home.zonnet.nl/galien8/prime/prime.html Web article by Johan G. van der Galiën. Shows that smaller starting digits are more common for primes below 10^9.
	Prime Numbers - http://odin.mdacc.tmc.edu/~krc/numbers/prime.html Short lesson.
	Entropy and Prime Numbers - http://web.tiscali.it/GEB/sfteng.htm Entropy of a nonnegative adjacency matrix related to prime numbers.

	Applets for Prime Numbers - http://www.brennen.net/primes/ Factorization and weights of Proth coefficients.
	Bertrand's Postulate - http://www.lacim.uqam.ca:16080/~plouffe/OEIS/archive_in_pdf/Bertrand.pdf International Mathematics Olympiad tutorial proving there is always a prime between n and 2n.
	Primality - http://www.maths.tcd.ie/pub/coursework/374/Primality.pdf Introductory text on the theory of prime numbers and number fields. Contains proofs of some important theorems including the fundamental theorem of arithmetic.
	Introductory Prime Number Theory Resources - http://www.secamlocal.ex.ac.uk/~mwatkins/zeta/tutorial.htm Notes and links compiled by Mark Watkins on the relation of the Riemann zeta function to the distribution of prime numbers.
	All You Wanted to Know about Primes - http://uk.geocities.com/nassarawa@btinternet.com/primefaq.htm Information by Joe McLean. Includes fundamentals, frequency, primality proofs and special types. Many definitions and theorems.

	Riesel Prime Database - http://www.rieselprime.org The "Riesel Prime Search" project is searching for primes of the form k·2^n-1, odd k.
	Gebhard Glöggler - http://www.g-gloeggler.de Makes a statement about the number of primes between the squares of odd numbers, and provides a proof of Goldbach's conjecture.
	Prime Music - http://www.xs4all.nl/~limonade/limonades/priem/primemusic.html A musical piece translating prime factorizations to frequencies. Requires RealPlayer.
	The Prime Page - http://www.fortunecity.com/meltingpot/manchaca/799/prime.html Methods and definitions of finding prime numbers.

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