Number Fields with Prescribed Ramification - Number fields of degree up to seven ramified at only a few small primes.

Fermat Quotients Divisible by p - Wilfrid Keller and Jörg Richstein. A complete list of solutions (a, p) for odd prime bases a < 1000 and primes p < 10^11: for the single base a = 5 the larger interval p < 2^38.

Curves of Genus 2 - FTP site maintained by Victor Flynn. Formulae for Jacobian arithmetic and Maple algorithms.

Number Field Tables - FTP site at the University of Bordeaux. Fields of degree up to 7.

Pseudoprimes and Carmichael Numbers - Tables of the Fermat pseudoprimes base 2 up to 10^13 and Carmichael numbers up to 10^16.

The First 28,915 Odd Primes - Tabulated using a simple C program.

Extended Counts of Twin Primes - By Thomas Nicely. Counts in decades up to 10^12 then in steps of 10^12 up to 3.10^15, giving 3,310,517,800,844 pairs.

Multiply Perfect Numbers - Over 2000 multiperfect numbers sorted by numerical value and by factorisation.

The First 100,000 Prime Numbers - A Project Gutenberg etext.

The First 498 Bernoulli Numbers - A Project Gutenberg etext.

The Value of Zeta(3) to 1,000,000 Decimal Digits - A Project Gutenberg etext.

Bernoulli Computations - Irregular primes and relative class numbers. Irregular pairs (and Vandiver and cyclotomic residues) for primes up to 8 million. Compiled by Amin Shokrollahi.

Factorization Tables - Tables of the factorization of sigma(n).

Enumeration of Twin Primes and Brun's Constant - Enumeration of the twin primes, and the sum of their reciprocals, to 1.6 × 10^15. An improved estimate is obtained for Brun's constant, B2 = 1.90216 05824 ± 0.00000 00030. Error analysis is presented to support the opinion that the stated error bound represents a 99 % confidence level.

Vanishing Fermat Quotients - R. Ernvall and T. Metsänkylä. Tables of the pairs (p,k) such that the Fermat quotient q(k) = (k^{p-1}-1)/p vanishes mod p. The tables cover the primes p up to one million and, for each prime, the range 1 < k < p.

Database for Polynomials over the Rationals - By Jürgen Klüners and Gunter Malle. Polynomials for all transitive groups up to degree 15, for most of the possible combinations of signature and Galois group. Up to degree 7 the fields with minimal (absolute) discriminant with given Galois group and signature are included.

Table of Masses of 32-dimensional Even Unimodular Lattices - With any given root system. Oliver King.

Index Form Equations and Power Integral Bases in Algebraic Number Fields - Lists of results, description of algorithms and tables of numerical data, by István Gaál.

Dedekind Zeta Functions - Tabulated by Eyal Goren using Pari.

Fermat Near-misses - Noam Elkies. Approximate solutions of x^n + y^n = z^n in integers with 0 < x <= y < z < 2^23 and n in [4,20].

Algorithmic Number Theory: Tables and Links - Compiled by Noam Elkies.

Solutions to Mordell's Equation - Solutions to Y^2 = X^3 + k with k up to 10,000 in absolute value.

Carmichael Numbers and Lehmer's Problem - Carmichael numbers n up to 10^9 together with phi(n), (n-1)/phi(n) and the factorization of n.

Zeroes of the Riemann Zeta Function - By Andrew Odlyzko. The first 100,000 to 8 places, the first 1000 to 1000 places.