The highest order Sporadic Group . It has Order
See also Baby Monster Group, Bimonster, Leech Lattice
References
Conway, J. H.; Curtis, R. T.; Norton, S. P.; Parker, R. A.; and Wilson, R. A.
Atlas of Finite Groups: Maximal Subgroups and Ordinary Characters for Simple Groups. Oxford, England:
Clarendon Press, p. viii, 1985.
Conway, J. H. and Norton, S. P. ``Monstrous Moonshine.'' Bull. London Math. Soc. 11, 308-339, 1979.
Conway, J. H. and Sloane, N. J. A. ``The Monster Group and its 196884-Dimensional Space'' and ``A Monster Lie Algebra?''
Chs. 29-30 in Sphere Packings, Lattices, and Groups, 2nd ed.
New York: Springer-Verlag, pp. 554-571, 1993.
Wilson, R. A. ``ATLAS of Finite Group Representation.''
http://for.mat.bham.ac.uk/atlas/html/M.html.