André Gérardin (1879, Nancy, Meurthe-et-Moselle – 1953, Nancy, Meurthe-et-Moselle) was a French mathematician, specializing in number theory and calculating machines used in factoring large positive integers, finding primes, and calculating quadratic residues modulo a given positive integer.
[1] He was one of nine mathematicians who read the initial page proofs and suggested improvements for the first volume of Leonard E. Dickson's History of the Theory of Numbers.
[3] In that volume, Dickson and Gérardin announced for the first time that the Mersenne number M173 has the factor 730753.
[4] Gérardin was an Invited Speaker of the ICM in 1912 at Cambridge UK,[5][6][7] in 1920 at Strasbourg,[8][9] in 1928 at Bologna, and in 1932 at Zürich.
[1] In 1949, Paul Belgodère, the director (from 1949 to 1986) of the Institut Henri Poincaré, purchased the important mathematical library that Gérardin had accumulated at Nancy.