Monster group

   2⁴⁶ · 3²⁰ · 5⁹ · 7⁶ · 11² · 13³ · 17 · 19 · 23 · 29 · 31 · 41 · 47 · 59 · 71

= 808017424794512875886459904961710757005754368000000000

≈ 8 · 10⁵³.

The finite simple groups have been completely classified; there are several infinite families of finite simple groups, plus a number of "sporadic groups" that don't follow any pattern. The Monster group is the largest of these sporadic groups. See classification of finite simple groups.

The Monster was found by B. Fischer and R. Griess in 1973. It can be constructed as a group of rotations in a space of dimension 196,883 over the rational numbers.

The Monster group prominently features in the Monstrous Moonshine conjecture[?] which relates discrete and non-discrete mathematics and was proven by Richard Borcherds[?] in 1989.