| Macleod, Allan: University of Paisley. Computational number theory, elliptic curves, recreational number theory; High-precision computation of mathematical constants; Special function software. Publications; notes. |
| Mahler, Kurt: Papers in PDF or PostScript. With obituary by Alf van der Poorten. |
| Marklof, Jens: University of Bristol. Quantum Chaos, Equidistribution, Modular Forms. Publications, research projects. |
| Matthews, Keith: University of Queensland (emeritus). Computational problems, Diophantine equations, LLL, Collatz problem. Originator and maintainer of the Number Theory Web. |
| Mazur, Barry: Harvard University. Number theory, automorphic forms, arithmetic algebraic geometry. Papers and work in progress. |
| McMurdy, Ken: Rose-Hulman Institute of Technology. Elliptic curves. Lecture notes, preprints. |
| Melfi, Giuseppe: University of Pisa, Italy. Diophantine approximation; Modular forms; Elementary number theory; Practical numbers. Papers and thesis. |
| Mersenne, Marin: Annotated portal of resources about a Frenchman, who lived during in era of Descartes and Pascal and developed a type of formula to generate certain prime numbers. |
| Meuser, Diane: Boston University. Number theory and Algebraic geometry. Contact information. |
| Mihailescu, Preda: Universität-GH Paderborn. Primality proving; Computational number theory; complex and numerical analysis. Publications, thesis, software: CYCLOPROV, a LiDIA based C++ package for primality proving. |
| Milne, J. S.: Number theory, arithmetic geometry. |
| Morain, Francois: École Polytechnique. Computational number theory, cryptography. Papers, ECPP software. |
| Motohashi, Yoichi: Nihon University. Analytic number theory. Publications. |
| Murty, Kumar: University of Toronto, Canada. Publications and resources for Number Theory courses. |
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