Abstract group 256.6149: $C_4.(C_8\times Q_8)$

• Label: 256.6149
• Order: \( 2^{8} \)
• Exponent: \( 2^{4} \)
• Nilpotent: yes
• Solvable: yes
• $\card{G^{\mathrm{ab}}}$: \( 2^{5} \)
• $\card{Z(G)}$: \( 2^{4} \)
• $\card{\Aut(G)}$: \( 2^{12} \)
• $\card{\mathrm{Out}(G)}$: \( 2^{8} \)
• Perm deg.: $36$
• Trans deg.: $64$
• Rank: $3$

Group information

Description:	$C_4.(C_8\times Q_8)$
Order:	\(256\)\(\medspace = 2^{8} \)
Exponent:	\(16\)\(\medspace = 2^{4} \)
Automorphism group:	$C_2^4.C_2^6.C_2^2$, of order \(4096\)\(\medspace = 2^{12} \)
Composition factors:	$C_2$ x 8
Nilpotency class:	$3$
Derived length:	$2$

This group is nonabelian, a $p$-group (hence nilpotent, solvable, supersolvable, monomial, elementary, and hyperelementary), and metabelian.

Group statistics

Order	1	2	4	8	16
Elements	1	7	56	64	128	256
Conjugacy classes	1	5	18	24	40	88
Divisions	1	5	12	10	6	34
Autjugacy classes	1	4	6	7	3	21

Dimension	1	2	4	8	16
Irr. complex chars.	32	56	0	0	0	88
Irr. rational chars.	8	12	8	2	4	34

Minimal presentations

Permutation degree:	$36$
Transitive degree:	$64$
Rank:	$3$
Inequivalent generating triples:	$1344$

Minimal degrees of faithful linear representations

	Over $\mathbb{C}$	Over $\mathbb{R}$	Over $\mathbb{Q}$
Irreducible	none	none	none
Arbitrary	4	6	18

Constructions

Presentation:	$\langle a, b, c \mid b^{4}=c^{8}=[a,c]=1, a^{8}=c^{4}, b^{a}=b^{3}, c^{b}=c^{7} \rangle$
Permutation group:	Degree $36$ $\langle(1,2,7,13,8,12,21,28,5,11,22,10,6,23,4,20)(3,14,18,25,19,29,31,32,16,9,24,27,17,26,15,30) \!\cdots\! \rangle$
Matrix group:	$\left\langle \left(\begin{array}{rr} 13 & 10 \\ 14 & 11 \end{array}\right), \left(\begin{array}{rr} 13 & 8 \\ 24 & 21 \end{array}\right), \left(\begin{array}{rr} 3 & 16 \\ 16 & 3 \end{array}\right), \left(\begin{array}{rr} 9 & 0 \\ 0 & 9 \end{array}\right), \left(\begin{array}{rr} 17 & 0 \\ 0 & 17 \end{array}\right), \left(\begin{array}{rr} 1 & 16 \\ 16 & 17 \end{array}\right), \left(\begin{array}{rr} 1 & 24 \\ 8 & 25 \end{array}\right), \left(\begin{array}{rr} 6 & 11 \\ 1 & 10 \end{array}\right) \right\rangle \subseteq \GL_{2}(\Z/32\Z)$
	$\left\langle \left(\begin{array}{rr} 25 & 0 \\ 0 & 25 \end{array}\right), \left(\begin{array}{rr} 13 & 0 \\ 0 & 13 \end{array}\right), \left(\begin{array}{rr} 16 & 0 \\ 0 & 16 \end{array}\right), \left(\begin{array}{rr} 16 & 0 \\ 0 & 1 \end{array}\right), \left(\begin{array}{rr} 0 & 25 \\ 1 & 0 \end{array}\right), \left(\begin{array}{rr} 13 & 0 \\ 0 & 1 \end{array}\right), \left(\begin{array}{rr} 38 & 0 \\ 0 & 38 \end{array}\right), \left(\begin{array}{rr} 0 & 20 \\ 10 & 0 \end{array}\right) \right\rangle \subseteq \GL_{2}(\Z/51\Z)$
Direct product:	not isomorphic to a non-trivial direct product
Semidirect product:	not isomorphic to a non-trivial semidirect product
Trans. wreath product:	not isomorphic to a non-trivial transitive wreath product
Non-split product:	$(C_4\times C_8)$ . $Q_8$ (2)	$C_8$ . $(C_4:Q_8)$	$C_8$ . $(C_4.Q_8)$	$C_4$ . $(C_8\times Q_8)$	all 53

Elements of the group are displayed as words in the presentation generators from the presentation above.

Homology

Abelianization:	$C_{2}^{2} \times C_{8} $
Schur multiplier:	$C_{2}^{2}$
Commutator length:	$1$

Subgroups

There are 231 subgroups in 149 conjugacy classes, 83 normal (41 characteristic).

Characteristic subgroups are shown in this color. Normal (but not characteristic) subgroups are shown in this color.

Special subgroups

Center:	$Z \simeq$ $C_2\times C_8$	$G/Z \simeq$ $C_2\times D_4$
Commutator:	$G' \simeq$ $C_2\times C_4$	$G/G' \simeq$ $C_2^2\times C_8$
Frattini:	$\Phi \simeq$ $C_2^2\times C_8$	$G/\Phi \simeq$ $C_2^3$
Fitting:	$\operatorname{Fit} \simeq$ $C_4.(C_8\times Q_8)$	$G/\operatorname{Fit} \simeq$ $C_1$
Radical:	$R \simeq$ $C_4.(C_8\times Q_8)$	$G/R \simeq$ $C_1$
Socle:	$\operatorname{soc} \simeq$ $C_2^2$	$G/\operatorname{soc} \simeq$ $C_8\times D_4$
2-Sylow subgroup:	$P_{ 2 } \simeq$ $C_4.(C_8\times Q_8)$

Hi

Subgroup diagram and profile

Classes of subgroups up to conjugation

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Classes of subgroups up to automorphism

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Normal subgroups

Normal subgroups up to automorphism

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Subgroup information

Click on a subgroup in the diagram to see information about it.

Classes of subgroups up to conjugation

Order 256: $C_4.(C_8\times Q_8)$

Order 128: $C_8.(C_2\times D_4)$ x 2, $\OD_{32}:C_4$ x 2, $C_2^3.\OD_{16}$, $C_2\times C_4\times C_{16}$, $C_8.C_4^2$

Order 64: $C_4:C_{16}$ x 4, $\OD_{16}:C_4$ x 2, $C_8.C_8$ x 2, $C_4\times C_{16}$ x 2, $C_4^2:C_4$ x 2, $C_2\times \OD_{32}$ x 2, $C_2^2\times C_{16}$ x 2, $C_2\times C_4\times C_8$, $C_2^3.Q_8$, $C_2^3.D_4$

Order 32: $C_2\times C_{16}$ x 10, $C_4\times C_8$ x 6, $\OD_{32}$ x 4, $C_8:C_4$ x 2, $C_2\times \OD_{16}$ x 2, $C_2^2\times C_8$ x 2, $C_4^2:C_2$ x 2, $C_8.C_4$ x 2, $C_8:C_4$ x 2, $C_8:C_4$ x 2, $C_2\times C_4^2$

Order 16: $C_2\times C_8$ x 14, $C_{16}$ x 6, $C_4^2$ x 5, $\OD_{16}$ x 4, $C_4:C_4$ x 4, $C_2^2:C_4$ x 2, $C_2^2\times C_4$ x 2

Order 8: $C_2\times C_4$ x 16, $C_8$ x 10, $C_2^3$

Order 4: $C_4$ x 12, $C_2^2$ x 5

Order 2: $C_2$ x 5

Order 1: $C_1$

Classes of subgroups up to automorphism

Order 256: $C_4.(C_8\times Q_8)$

Order 128: $C_2^3.\OD_{16}$, $C_8.(C_2\times D_4)$, $C_2\times C_4\times C_{16}$, $C_8.C_4^2$, $\OD_{32}:C_4$

Order 64: $C_2^2\times C_{16}$ x 2, $\OD_{16}:C_4$, $C_2\times C_4\times C_8$, $C_8.C_8$, $C_4:C_{16}$, $C_4\times C_{16}$, $C_4^2:C_4$, $C_2\times \OD_{32}$, $C_2^3.Q_8$, $C_2^3.D_4$

Order 32: $C_2\times C_{16}$ x 7, $C_4\times C_8$ x 3, $C_2^2\times C_8$ x 2, $\OD_{32}$ x 2, $C_8:C_4$, $C_2\times \OD_{16}$, $C_4^2:C_2$, $C_2\times C_4^2$, $C_8.C_4$, $C_8:C_4$, $C_8:C_4$

Order 16: $C_2\times C_8$ x 11, $C_4^2$ x 3, $C_{16}$ x 3, $\OD_{16}$ x 2, $C_2^2\times C_4$ x 2, $C_4:C_4$, $C_2^2:C_4$

Order 8: $C_2\times C_4$ x 9, $C_8$ x 7, $C_2^3$

Order 4: $C_4$ x 6, $C_2^2$ x 4

Order 2: $C_2$ x 4

Order 1: $C_1$

Normal subgroups (quotient in parentheses)

Order 256: $C_4.(C_8\times Q_8)$ ($C_1$)

Order 128: $C_8.(C_2\times D_4)$ ($C_2$) x 2, $\OD_{32}:C_4$ ($C_2$) x 2, $C_2^3.\OD_{16}$ ($C_2$), $C_2\times C_4\times C_{16}$ ($C_2$), $C_8.C_4^2$ ($C_2$)

Order 64: $\OD_{16}:C_4$ ($C_2^2$) x 2, $C_4^2:C_4$ ($C_4$) x 2, $C_2\times \OD_{32}$ ($C_2^2$) x 2, $C_2^2\times C_{16}$ ($C_2^2$) x 2, $C_2\times C_4\times C_8$ ($C_2^2$), $C_2^3.Q_8$ ($C_4$), $C_2^3.D_4$ ($C_4$)

Order 32: $C_2\times \OD_{16}$ ($C_2\times C_4$) x 2, $C_4\times C_8$ ($Q_8$) x 2, $C_4\times C_8$ ($D_4$) x 2, $C_4^2:C_2$ ($C_2\times C_4$) x 2, $C_2\times C_{16}$ ($Q_8$) x 2, $C_2\times C_{16}$ ($D_4$) x 2, $C_8:C_4$ ($C_8$) x 2, $C_8:C_4$ ($C_8$) x 2, $C_2^2\times C_8$ ($C_2^3$), $C_2^2\times C_8$ ($C_2\times C_4$), $C_2\times C_4^2$ ($C_2\times C_4$)

Order 16: $C_4:C_4$ ($C_2\times C_8$) x 4, $C_2\times C_8$ ($\OD_{16}$) x 2, $C_2\times C_8$ ($C_2\times C_8$) x 2, $C_2\times C_8$ ($C_4:C_4$) x 2, $C_2\times C_8$ ($D_4:C_2$) x 2, $C_2\times C_8$ ($C_2\times Q_8$) x 2, $C_2\times C_8$ ($C_2\times D_4$) x 2, $C_4^2$ ($C_4:C_4$) x 2, $C_2^2\times C_4$ ($C_2^2\times C_4$)

Order 8: $C_8$ ($C_4:C_8$) x 4, $C_2^3$ ($\OD_{16}:C_2$), $C_2\times C_4$ ($\OD_{16}:C_2$), $C_2\times C_4$ ($C_2\times \OD_{16}$), $C_2\times C_4$ ($C_2^2\times C_8$), $C_2\times C_4$ ($C_4\times Q_8$), $C_2\times C_4$ ($C_4\times D_4$), $C_2\times C_4$ ($C_2^2.D_4$), $C_8$ ($C_4:Q_8$), $C_8$ ($C_4.Q_8$), $C_8$ ($C_2^2:Q_8$), $C_8$ ($C_4:D_4$)

Order 4: $C_2^2$ ($C_8:Q_8$), $C_2^2$ ($C_8\times D_4$), $C_2^2$ ($C_4^2.C_2^2$), $C_4$ ($C_2^3.C_2^3$), $C_4$ ($C_8\times Q_8$), $C_4$ ($C_8:D_4$), $C_4$ ($C_4^2.C_4$)

Order 2: $C_2$ ($C_{16}.D_4$) x 2, $C_2$ ($C_4^2.D_4$)

Order 1: $C_1$ ($C_4.(C_8\times Q_8)$)

Normal subgroups up to automorphism (quotient in parentheses)

Order 256: $C_4.(C_8\times Q_8)$ ($C_1$)

Order 128: $C_2^3.\OD_{16}$ ($C_2$), $C_8.(C_2\times D_4)$ ($C_2$), $C_2\times C_4\times C_{16}$ ($C_2$), $C_8.C_4^2$ ($C_2$), $\OD_{32}:C_4$ ($C_2$)

Order 64: $C_2^2\times C_{16}$ ($C_2^2$) x 2, $\OD_{16}:C_4$ ($C_2^2$), $C_2\times C_4\times C_8$ ($C_2^2$), $C_4^2:C_4$ ($C_4$), $C_2\times \OD_{32}$ ($C_2^2$), $C_2^3.Q_8$ ($C_4$), $C_2^3.D_4$ ($C_4$)

Order 32: $C_2\times \OD_{16}$ ($C_2\times C_4$), $C_2^2\times C_8$ ($C_2^3$), $C_2^2\times C_8$ ($C_2\times C_4$), $C_4\times C_8$ ($Q_8$), $C_4\times C_8$ ($D_4$), $C_4^2:C_2$ ($C_2\times C_4$), $C_2\times C_4^2$ ($C_2\times C_4$), $C_2\times C_{16}$ ($Q_8$), $C_2\times C_{16}$ ($D_4$), $C_8:C_4$ ($C_8$), $C_8:C_4$ ($C_8$)

Order 16: $C_2\times C_8$ ($C_2\times C_8$) x 2, $C_2\times C_8$ ($D_4:C_2$) x 2, $C_2\times C_8$ ($C_2\times Q_8$) x 2, $C_2\times C_8$ ($C_2\times D_4$) x 2, $C_2\times C_8$ ($\OD_{16}$), $C_2\times C_8$ ($C_4:C_4$), $C_4:C_4$ ($C_2\times C_8$), $C_4^2$ ($C_4:C_4$), $C_2^2\times C_4$ ($C_2^2\times C_4$)

Order 8: $C_8$ ($C_4:C_8$) x 2, $C_2^3$ ($\OD_{16}:C_2$), $C_2\times C_4$ ($\OD_{16}:C_2$), $C_2\times C_4$ ($C_2\times \OD_{16}$), $C_2\times C_4$ ($C_2^2\times C_8$), $C_2\times C_4$ ($C_4\times Q_8$), $C_2\times C_4$ ($C_4\times D_4$), $C_2\times C_4$ ($C_2^2.D_4$), $C_8$ ($C_4:Q_8$), $C_8$ ($C_4.Q_8$), $C_8$ ($C_2^2:Q_8$), $C_8$ ($C_4:D_4$)

Order 4: $C_2^2$ ($C_8:Q_8$), $C_2^2$ ($C_8\times D_4$), $C_2^2$ ($C_4^2.C_2^2$), $C_4$ ($C_2^3.C_2^3$), $C_4$ ($C_8\times Q_8$), $C_4$ ($C_8:D_4$), $C_4$ ($C_4^2.C_4$)

Order 2: $C_2$ ($C_{16}.D_4$), $C_2$ ($C_4^2.D_4$)

Order 1: $C_1$ ($C_4.(C_8\times Q_8)$)

Series

Derived series

$C_4.(C_8\times Q_8)$

$\rhd$

$C_2\times C_4$

$\rhd$

$C_1$

Chief series

$C_4.(C_8\times Q_8)$

$\rhd$

$C_8.C_4^2$

$\rhd$

$C_2\times C_4\times C_8$

$\rhd$

$C_2^2\times C_8$

$\rhd$

$C_2^2\times C_4$

$\rhd$

$C_2\times C_4$

$\rhd$

$C_4$

$\rhd$

$C_2$

$\rhd$

$C_1$

Lower central series

$C_4.(C_8\times Q_8)$

$\rhd$

$C_2\times C_4$

$\rhd$

$C_2$

$\rhd$

$C_1$

Upper central series

$C_1$

$\lhd$

$C_2\times C_8$

$\lhd$

$C_2^2\times C_{16}$

$\lhd$

$C_4.(C_8\times Q_8)$

Supergroups

This group is a maximal subgroup of 3 larger groups in the database.

This group is a maximal quotient of 12 larger groups in the database.

Character theory

Complex character table

See the $88 \times 88$ character table. Alternatively, you may search for characters of this group with desired properties.

Rational character table

See the $34 \times 34$ rational character table.