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Number theory — Audiobooks

Essays on the Theory of Numbers
by Richard Dedekind

The Theory of Numbers
by R. D. (Robert Daniel) Carmichael

The 32nd Mersenne Prime
by David Slowinski

Zahlentheorie
by Kurt Hensel
Some Famous Problems of the Theory of Numbers and in Particular Waring's Problem
by G. H. (Godfrey Harold) Hardy

Sur les Principes Fondamentaux de la Théorie des Nombres et de la Géométrie
by H. (Hermann) Laurent