| Number Theory Web: Things of interest to number theorists collected by Keith Matthews. |
| A Mechanical Proof of Quadratic Reciprocity: A paper by David M. Russinoff describing the use of the Boyer-Moore theorem prover in mechanically generating a proof of the Law of Quadratic Reciprocity. PS/PDF. |
| Active Elementary Number Theory: Interactive (Javascript) expression of a number as a sum of two squares. |
| Application of Digital Root: A test for the terms of a sequence being expressed by a polynomial, by Roupam Ghosh. |
| Covers, Sumsets and Zero-sums: A unified approach to covering systems, restricted sumsets and zero-sum problems by Zhi-Wei Sun. |
| Fermat's Little Theorem: With notes on Carmichael numbers and the life of R.D. Carmichael. |
| Frequently Asked Questions: Number Theory section of the sci.math FAQ list. |
| Hakmem Continued Fractions: Some notes from the MIT collection. Includes Gosper's algorithms for CF arithmetic. |
| Infinite Series Theorem: Addresses the question whether a series of rational functions converges to a rational number. |
| Integer Relations: To determine linear integer dependence among numerical constants and to determine the minimal polynomial of an approximate algebraic number. Interactive or via email. |
| Introduction to Bernoulli Numbers: A web article with a brief history and account of their relationship with the Riemann zeta function and Fermat's Last Theorem (HTML/PS). |
| Klein Polyhedra: Examples and algorithms for computing Klein polyhedra, also known as Arnold sails or veils (voiles), by Keith Briggs. |
| L-Functions: Classified by degree, then by level, then by eigenvalue, then by root number. |
| Lehmer's Conjecture: That the Mahler measure of an algebraic number is bounded away from 1. Pages by Michael Mossinghoff, UCLA. |
| Linear Independence Measures for Logarithms of Algebraic Numbers: Michel Waldschmidt. Cetraro summer school lectures, July 2000. |
| MathPages: Number Theory: Kevin Brown's collection of sci.math postings related to number theory topics. |
| MathWorld Number Theory: Index to articles in Eric Weisstein's MathWorld in the area of number theory. |
| Noncommutative Geometry, Trace Formulae and the Zeroes of the Riemann Zeta Function: Lecture notes by Alain Connes. |
| Number Theory: Dave Rusin's guide to number theory. |
| Number Theory: Proofs along with equation solvers and graphical views written in Java. |
| Number Theory Foundation: Aims to collect donations from supporters of number theory and to disburse these donations to encourage research. |
| Number Theory Glossary: Compiled by Robert Campbell. |
| On-Line Encyclopedia of Integer Sequences: Given an integer sequence, find its name, and formula. |
| Online Seminar: Galois theory of p-Extensions: Email seminar on "Galoissche Theorie der p-Erweiterungen" by Helmut Koch. |
| Other Maths: A wide selection of number theory topics compiled by Jon Perry. |
| Some Highlights of Arithmetic Combinatorics: Lecture notes and resources on combinatorial number theory by Terence Tao. |
| Some Number-Theoretical Constants: Products of rational functions of p over primes, computed by Gerhard Niklasch and Pieter Moree. |
| Somos Polynomials: Related to Somos sequences and elliptic theta functions. |
| Square-free Gaps: Algorithm and source code for the calculation of square-free numbers and gaps. |
| The Arithmetic Properties of Binomial Coefficients: Activated text by Andrew Granville. |
| The Canadian Number Theory Association: A loosely defined group of individuals, mainly in Canada, active in research in Number Theory. |
| The Somos Sequence Site: Web resources for information on Somos sequences and related topics such as elliptic divisibility sequences. |
| The Valuation Theory Home Page: A forum for all mathematicians who work in valuation theory or apply valuation theoretical results in their own field of research. |
| The Work of Robert Langlands: Thesis, papers, manuscripts, letters and bibliography. |
| Transcendental Numbers: Maple worksheets, lecture notes and links to other resources by John Cosgrove. |
| Vignettes on Automorphic and Modular forms, Representations, L-functions, and Number Theory: By Paul Garrett. |
| Visible Structures in Number Theory: By Peter Borwein and Loki Jörgenson. Recognising number patterns visually. |
| World Records for Numerical Palindromes: The 196 Palindrome Quest and The Most Delayed Palindromic Number, by Jason Doucette. |
Classical
