Groups of order 168

This article gives information about, and links to more details on, groups of order 168
See pages on algebraic structures of order 168 | See pages on groups of a particular order

Statistics at a glance

The prime factorization of 168 is:

$168=2^3\cdot 3\cdot 7=8\cdot 3\cdot 7$

Quantity	Value	List/comment
Total number of groups	57
Total number of abelian groups	3	(number of abelian groups of order $2^3$) times (number of abelian groups of order $3^1$) times (number of abelian groups of order $7^1$) = $3\times 1\times 1=3$. See classification of finite abelian groups and structure theorem for finitely generated abelian groups.
Total number of nilpotent groups	5	(number of groups of order 8) times (number of groups of order 3) times (number of groups of order 7) = $5\times 1\times 1=5$. See number of nilpotent groups equals product of number of groups of order each maximal prime power divisor, which in turn follows from equivalence of definitions of finite nilpotent group.
Total number of solvable groups	56	the only non-solvable group is the simple non-abelian group projective special linear group:PSL(3,2), which is also isomorphic to $PSL(2,7)$.
Total number of simple groups	1	the simple non-abelian group projective special linear group:PSL(3,2), which is also isomorphic to $PSL(2,7)$.

GAP implementation

The order 168 is part of GAP's SmallGroup library. Hence, any group of order 168 can be constructed using the SmallGroup function by specifying its group ID. Also, IdGroup is available, so the group ID of any group of this order can be queried.

Further, the collection of all groups of order 168 can be accessed as a list using GAP's AllSmallGroups function.

Here is GAP's summary information about how it stores groups of this order, accessed using GAP's SmallGroupsInformation function:

gap> SmallGroupsInformation(168);

  There are 57 groups of order 168.
  They are sorted by their Frattini factors.
     1 has Frattini factor [ 42, 1 ].
     2 has Frattini factor [ 42, 2 ].
     3 has Frattini factor [ 42, 3 ].
     4 has Frattini factor [ 42, 4 ].
     5 has Frattini factor [ 42, 5 ].
     6 has Frattini factor [ 42, 6 ].
     7 - 11 have Frattini factor [ 84, 7 ].
     12 - 18 have Frattini factor [ 84, 8 ].
     19 - 21 have Frattini factor [ 84, 9 ].
     22 has Frattini factor [ 84, 10 ].
     23 has Frattini factor [ 84, 11 ].
     24 - 28 have Frattini factor [ 84, 12 ].
     29 - 33 have Frattini factor [ 84, 13 ].
     34 - 38 have Frattini factor [ 84, 14 ].
     39 - 41 have Frattini factor [ 84, 15 ].
     42 - 57 have trivial Frattini subgroup.

  For the selection functions the values of the following attributes
  are precomputed and stored:
     IsAbelian, IsNilpotentGroup, IsSupersolvableGroup, IsSolvableGroup,
     LGLength, FrattinifactorSize and FrattinifactorId.

  This size belongs to layer 2 of the SmallGroups library.
  IdSmallGroup is available for this size.