84011 Jean-Claude
84 may refer to: * 84 (number) * one of the years 84 BC, AD 84, 1984, AD 2084 * Eighty Four, Pennsylvania, an unincorporated census-designated place in Washington County, Pennsylvania, United States * Seksendört, a Turkish pop group whose name means 84 See also * * List of highways numbered A ''list'' is any set of items in a row. List or lists may also refer to: People * List (surname) Organizations * List College, an undergraduate division of the Jewish Theological Seminary of America * SC Germania List, German rugby union ...

84 (number)
84 (eighty-four) is the natural number following 83 and preceding 85. In mathematics 84 is: * the sum of the first seven triangular numbers (making it a tetrahedral number). * a Dodecahedral number. * the sum of a twin prime (41 + 43). * a semiperfect number, being thrice a perfect number. * a palindromic number and a repdigit in bases 11 (7711), 13 (6613), 20 (4420), 27 (3327), and 41 (2241). * the lim sup of the largest finite subgroup of the mapping class group of a genus ''g'' surface divided by ''g''. A hepteract is a seven-dimensional hypercube with 84 penteract 5-faces. In astronomy *Messier object M84, a magnitude 11.0 lenticular galaxy in the constellation Virgo *The New General Cataloguebr>object NGC 84, a single star in the constellation Andromeda In other fields Eighty-four is also: * The year AD 84, 84 BC, or 1984. * The number of years in the , a cycle used in the past by Celtic peoples, equal to 3 cycles of the Julian Calendar and to 4 Metonic ...
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