From Alta Vista:

• AMS preprints in Number Theory
• Algebraic Number Theory Archives

Preprint archives for papers in Algebraic Number Theory and Arithmetic Geometry
• Algebraic Number Theory Archives (UK mirror)
• Analytic Number Theory

Lecture Notes by Noam Elkies
• Archives of Number Theory List

Archives of postings by number theorists and number theory enthusiasts to the Number Theory mailing list
• Arithmetic Algebraic Geometry

A European network of 12 working groups from 5 countries
• Binary Cubic Forms and Cubic Number Fields

an activated text by Henri Cohen
• Cyclotomic Fields Virtual Study Group

A group of people studying L. Washington : `Introduction to cyclotomic fields', Graduate Texts in Mathematics 83, Springer Verlag.
• Galois fields

Tables and software for calculations with finite fields and polynomials over them.
• Introduction to Number Theory

Introduction to Number Theory
• K-theory Preprint Archives

Electronic preprint archives for mathematics research papers in K-theory.
• Lecture notes by John Cosgrave

courses in Number Theory at St Patrick's College Dublin
• Lehmer's Conjecture

That the Mahler measure of an algebraic is bounded away from 1
• MAA books on Numbers and Number Theory
• Math Front: NT Number Theory

Front page for the number theory section of the arxiv (was Los Alamos) preprint server
• MathPages: Number Theory

Kevin Brown's collection of sci.math postings related to number theory topics
• NFSNET

A project to factor numbers with the Number Field Sieve.
• Number Field Database

Information about algebraic number fields of degrees 1 up to about 16, predominantly about fields not too far from the minimal absolute discriminants per signature.
• Number Theory Foundation

Aims to collect donations from supporters of number theory and to disburse these donations to encourage research.
• Number Theory Web

Things of interest to number theorists collected by Keith Matthews
• Number Theory Web (American site)

American mirror of the Number Theory Web
• Number Theory Web (UK site)

UK mirror of the Number Theory Web
• Number theory

Dave Rusin's guide to number theory.
• On-Line Encyclopedia of Integer Sequences

Given an integer sequence, find its name, formula, etcetera
• Paul Garrett: Crypto and Number Theory

Lecture notes for a course on cryptography and number theory.
• Perfectly Scientific Inc

PSI offers software, documents, books on the subjects of: compression, wavelets, FFT, general transforms, color graphics, Monte Carlo, fractals, convolution,signal processing, matrix algebra, genetic algorithms, number theory as used in factoring, cryptography
• Reciprocity Laws

Franz Lemmermeyer's on-line book on reciprocity laws, with bibliography and proofs of quadatric reciprocity.
• Riemann's paper

Ueber die Anzahl der Primzahlen unter einer gegebenen Grösse, and in translation.
• SECANTS

South of England Computational and Algorithmic Number Theory Seminars
• Software and other links

In the Number Theory Web
• Tables of Bernoulli computations

Irregular primes and relative class numbers
• Tables of Number Fields with Prescribed Ramification

Number fields of degree up to seven ramified at only a few small primes
• The 3x + 1 Problem and its Generalizations

A survey article by Jeff Lagarias on the Collatz Problem.
• The 3x+1 problem search results

Maximum number tested (N): 77·2^50 = 86694292826882048.
• The Arithmetic Properties of Binomial Coefficients

an activated text by Andrew Granville
• The Cunningham Project

aims to factor the numbers b^n +- 1 for b = 2, 3, 5, 6, 7, 10, 11, 12
• The Riemann Hypothesis

Papers and other links related to RH
• The work of Robert Langlands



---


From Yahoo:
 
• Around the Goedel's Theorem - Platonism, intuition and the nature of mathematics. Axiomatic set theory. Incompleteness theorems and related results; methodological consequences.
• Binary, Primes, and Factors - binary representation of numbers for use in number theory for primes and factoring.
• Concealed Paradoxes in Mathematics and Physics
• FactorWorld - dedicated to algorithms and computational results on integer factorization.
• Millennial Conference on Number Theory - May 21-26, 2000; University of Illinois at Urbana-Champaign.
• NTL - portable C++ library for problems in algebra and number theory.
• Number Theory [seanet.com]
• Number Theory Web - This contains items of interest to Number Theorists
• Number Theory Web Site - relative congruence.
• Recreational Topics from the Theory of Numbers

  ---