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Properties

Label 256.26319
Order \( 2^{8} \)
Exponent \( 2^{4} \)
Nilpotent yes
Solvable yes
$\card{G^{\mathrm{ab}}}$ \( 2^{6} \)
$\card{Z(G)}$ \( 2^{5} \)
$\card{\Aut(G)}$ \( 2^{16} \)
$\card{\mathrm{Out}(G)}$ \( 2^{13} \)
Perm deg. $22$
Trans deg. $64$
Rank $4$

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Show commands: Gap / Magma / SageMath

Copy content magma:G := SmallGroup(256, 26319);
 
Copy content gap:G := SmallGroup(256, 26319);
 
Copy content sage_gap:G = libgap.SmallGroup(256, 26319)
 
Copy content comment:Define the group as a permutation group
 
Copy content sage:G = PermutationGroup(['(1,2,4,7,5,8,11,14,3,6,9,12,10,13,15,16)(18,20)', '(1,3)(4,9)(5,10)(11,15)(17,18)(19,20)(21,22)', '(2,6)(7,12)(8,13)(14,16)(17,19)(18,20)', '(1,3)(2,6)(4,9)(5,10)(7,12)(8,13)(11,15)(14,16)(17,19)(18,20)(21,22)', '(1,3)(2,6)(4,9)(5,10)(7,12)(8,13)(11,15)(14,16)(17,19)(18,20)', '(1,4,5,11,3,9,10,15)(2,7,8,14,6,12,13,16)', '(1,5,3,10)(2,8,6,13)(4,11,9,15)(7,14,12,16)', '(1,3)(2,6)(4,9)(5,10)(7,12)(8,13)(11,15)(14,16)'])
 

Group information

Description:$C_2^3:\OD_{32}$
Order: \(256\)\(\medspace = 2^{8} \)
Copy content comment:Order of the group
 
Copy content magma:Order(G);
 
Copy content gap:Order(G);
 
Copy content sage:G.order()
 
Copy content sage_gap:G.Order()
 
Exponent: \(16\)\(\medspace = 2^{4} \)
Copy content comment:Exponent of the group
 
Copy content magma:Exponent(G);
 
Copy content gap:Exponent(G);
 
Copy content sage:G.exponent()
 
Copy content sage_gap:G.Exponent()
 
Automorphism group:$C_2^7.C_2^5.C_2^4$, of order \(65536\)\(\medspace = 2^{16} \)
Copy content comment:Automorphism group
 
Copy content gap:AutomorphismGroup(G);
 
Copy content magma:AutomorphismGroup(G);
 
Copy content sage_gap:G.AutomorphismGroup()
 
Composition factors:$C_2$ x 8
Copy content comment:Composition factors of the group
 
Copy content magma:CompositionFactors(G);
 
Copy content gap:CompositionSeries(G);
 
Copy content sage:G.composition_series()
 
Copy content sage_gap:G.CompositionSeries()
 
Nilpotency class:$2$
Copy content comment:Nilpotency class of the group
 
Copy content magma:NilpotencyClass(G);
 
Copy content gap:NilpotencyClassOfGroup(G);
 
Copy content sage_gap:G.NilpotencyClassOfGroup()
 
Derived length:$2$
Copy content comment:Derived length of the group
 
Copy content magma:DerivedLength(G);
 
Copy content gap:DerivedLength(G);
 
Copy content sage_gap:G.DerivedLength()
 

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

Copy content comment:Determine if the group G is abelian
 
Copy content magma:IsAbelian(G);
 
Copy content gap:IsAbelian(G);
 
Copy content sage:G.is_abelian()
 
Copy content sage_gap:G.IsAbelian()
 
Copy content comment:Determine if the group G is cyclic
 
Copy content magma:IsCyclic(G);
 
Copy content gap:IsCyclic(G);
 
Copy content sage:G.is_cyclic()
 
Copy content sage_gap:G.IsCyclic()
 
Copy content comment:Determine if the group G is nilpotent
 
Copy content magma:IsNilpotent(G);
 
Copy content gap:IsNilpotentGroup(G);
 
Copy content sage:G.is_nilpotent()
 
Copy content sage_gap:G.IsNilpotentGroup()
 
Copy content comment:Determine if the group G is solvable
 
Copy content magma:IsSolvable(G);
 
Copy content gap:IsSolvableGroup(G);
 
Copy content sage:G.is_solvable()
 
Copy content sage_gap:G.IsSolvableGroup()
 
Copy content comment:Determine if the group G is supersolvable
 
Copy content gap:IsSupersolvableGroup(G);
 
Copy content sage:G.is_supersolvable()
 
Copy content sage_gap:G.IsSupersolvableGroup()
 
Copy content comment:Determine if the group G is simple
 
Copy content magma:IsSimple(G);
 
Copy content gap:IsSimpleGroup(G);
 
Copy content sage_gap:G.IsSimpleGroup()
 

Group statistics

Copy content comment:Compute statistics for the group G
 
Copy content magma:// Magma code to output the first two rows of the group statistics table element_orders := [Order(g) : g in G]; orders := Set(element_orders); printf "Orders: %o\n", orders; printf "Elements: %o %o\n", [#[x : x in element_orders | x eq n] : n in orders], Order(G); cc_orders := [cc[1] : cc in ConjugacyClasses(G)]; printf "Conjugacy classes: %o %o\n", [#[x : x in cc_orders | x eq n] : n in orders], #cc_orders;
 
Copy content gap:# Gap code to output the first two rows of the group statistics table element_orders := List(Elements(G), g -> Order(g)); orders := Set(element_orders); Print("Orders: ", orders, "\n"); element_counts := List(orders, n -> Length(Filtered(element_orders, x -> x = n))); Print("Elements: ", element_counts, " ", Size(G), "\n"); cc_orders := List(ConjugacyClasses(G), cc -> Order(Representative(cc))); cc_counts := List(orders, n -> Length(Filtered(cc_orders, x -> x = n))); Print("Conjugacy classes: ", cc_counts, " ", Length(ConjugacyClasses(G)), "\n");
 
Copy content sage:# Sage code to output the first two rows of the group statistics table element_orders = [g.order() for g in G] orders = sorted(list(set(element_orders))) print("Orders:", orders) print("Elements:", [element_orders.count(n) for n in orders], G.order()) cc_orders = [cc[0].order() for cc in G.conjugacy_classes()] print("Conjugacy classes:", [cc_orders.count(n) for n in orders], len(cc_orders))
 

Order 1 2 4 8 16
Elements 1 31 32 64 128 256
Conjugacy classes   1 19 20 40 32 112
Divisions 1 19 12 12 8 52
Autjugacy classes 1 5 5 4 1 16

Copy content comment:Compute statistics about the characters of G
 
Copy content magma:// Outputs [<d_1,c_1>, <d_2,c_2>, ...] where c_i is the number of irr. complex chars. of G with degree d_i CharacterDegrees(G);
 
Copy content gap:# Outputs [[d_1,c_1], [d_2,c_2], ...] where c_i is the number of irr. complex chars. of G with degree d_i CharacterDegrees(G);
 
Copy content sage:# Outputs [[d_1,c_1], [d_2,c_2], ...] where c_i is the number of irr. complex chars. of G with degree d_i character_degrees = [c[0] for c in G.character_table()] [[n, character_degrees.count(n)] for n in set(character_degrees)]
 
Copy content sage_gap:G.CharacterDegrees()
 

Dimension 1 2 4 8
Irr. complex chars.   64 48 0 0 112
Irr. rational chars. 16 16 12 8 52

Minimal presentations

Permutation degree:$22$
Transitive degree:$64$
Rank: $4$
Inequivalent generating quadruples: $20160$

Minimal degrees of faithful linear representations

Over $\mathbb{C}$ Over $\mathbb{R}$ Over $\mathbb{Q}$
Irreducible none none none
Arbitrary not computed not computed not computed

Constructions

Show commands: Gap / Magma / SageMath


Presentation: $\langle a, b, c, d, e \mid a^{2}=b^{2}=c^{2}=d^{2}=e^{16}=[a,b]=[a,c]=[a,d]=[a,e]=[b,c]=[b,d]=[c,d]=[d,e]=1, e^{b}=e^{9}, e^{c}=de \rangle$ Copy content Toggle raw display
Copy content comment:Define the group with the given generators and relations
 
Copy content magma:G := PCGroup([8, 2, 2, 2, 2, 2, 2, 2, 2, 2892, 260, 116, 141, 166]); a,b,c,d,e := Explode([G.1, G.2, G.3, G.4, G.5]); AssignNames(~G, ["a", "b", "c", "d", "e", "e2", "e4", "e8"]);
 
Copy content gap:G := PcGroupCode(2361761971716566876272,256); a := G.1; b := G.2; c := G.3; d := G.4; e := G.5;
 
Copy content sage:# This uses Sage's interface to GAP, as Sage (currently) has no native support for PC groups G = gap.new('PcGroupCode(2361761971716566876272,256)'); a = G.1; b = G.2; c = G.3; d = G.4; e = G.5;
 
Copy content sage_gap:# This uses Sage's interface to GAP, as Sage (currently) has no native support for PC groups G = gap.new('PcGroupCode(2361761971716566876272,256)'); a = G.1; b = G.2; c = G.3; d = G.4; e = G.5;
 
Permutation group:Degree $22$ $\langle(1,2,4,7,5,8,11,14,3,6,9,12,10,13,15,16)(18,20), (1,3)(4,9)(5,10)(11,15) \!\cdots\! \rangle$ Copy content Toggle raw display
Copy content comment:Define the group as a permutation group
 
Copy content magma:G := PermutationGroup< 22 | (1,2,4,7,5,8,11,14,3,6,9,12,10,13,15,16)(18,20), (1,3)(4,9)(5,10)(11,15)(17,18)(19,20)(21,22), (2,6)(7,12)(8,13)(14,16)(17,19)(18,20), (1,3)(2,6)(4,9)(5,10)(7,12)(8,13)(11,15)(14,16)(17,19)(18,20)(21,22), (1,3)(2,6)(4,9)(5,10)(7,12)(8,13)(11,15)(14,16)(17,19)(18,20), (1,4,5,11,3,9,10,15)(2,7,8,14,6,12,13,16), (1,5,3,10)(2,8,6,13)(4,11,9,15)(7,14,12,16), (1,3)(2,6)(4,9)(5,10)(7,12)(8,13)(11,15)(14,16) >;
 
Copy content gap:G := Group( (1,2,4,7,5,8,11,14,3,6,9,12,10,13,15,16)(18,20), (1,3)(4,9)(5,10)(11,15)(17,18)(19,20)(21,22), (2,6)(7,12)(8,13)(14,16)(17,19)(18,20), (1,3)(2,6)(4,9)(5,10)(7,12)(8,13)(11,15)(14,16)(17,19)(18,20)(21,22), (1,3)(2,6)(4,9)(5,10)(7,12)(8,13)(11,15)(14,16)(17,19)(18,20), (1,4,5,11,3,9,10,15)(2,7,8,14,6,12,13,16), (1,5,3,10)(2,8,6,13)(4,11,9,15)(7,14,12,16), (1,3)(2,6)(4,9)(5,10)(7,12)(8,13)(11,15)(14,16) );
 
Copy content sage:G = PermutationGroup(['(1,2,4,7,5,8,11,14,3,6,9,12,10,13,15,16)(18,20)', '(1,3)(4,9)(5,10)(11,15)(17,18)(19,20)(21,22)', '(2,6)(7,12)(8,13)(14,16)(17,19)(18,20)', '(1,3)(2,6)(4,9)(5,10)(7,12)(8,13)(11,15)(14,16)(17,19)(18,20)(21,22)', '(1,3)(2,6)(4,9)(5,10)(7,12)(8,13)(11,15)(14,16)(17,19)(18,20)', '(1,4,5,11,3,9,10,15)(2,7,8,14,6,12,13,16)', '(1,5,3,10)(2,8,6,13)(4,11,9,15)(7,14,12,16)', '(1,3)(2,6)(4,9)(5,10)(7,12)(8,13)(11,15)(14,16)'])
 
Matrix group:$\left\langle \left(\begin{array}{rr} 1 & 1 \\ 0 & 1 \end{array}\right), \left(\begin{array}{rr} 9 & 0 \\ 0 & 1 \end{array}\right), \left(\begin{array}{rr} 1 & 2 \\ 0 & 1 \end{array}\right), \left(\begin{array}{rr} 1 & 8 \\ 8 & 9 \end{array}\right), \left(\begin{array}{rr} 9 & 0 \\ 0 & 9 \end{array}\right), \left(\begin{array}{rr} 15 & 0 \\ 8 & 15 \end{array}\right), \left(\begin{array}{rr} 1 & 4 \\ 0 & 1 \end{array}\right), \left(\begin{array}{rr} 1 & 8 \\ 0 & 1 \end{array}\right) \right\rangle \subseteq \GL_{2}(\Z/16\Z)$
Copy content comment:Define the group as a matrix group with coefficients in GLZq
 
Copy content magma:G := MatrixGroup< 2, Integers(16) | [[1, 1, 0, 1], [9, 0, 0, 1], [1, 2, 0, 1], [1, 8, 8, 9], [9, 0, 0, 9], [15, 0, 8, 15], [1, 4, 0, 1], [1, 8, 0, 1]] >;
 
Copy content gap:G := Group([[[ZmodnZObj(1,16), ZmodnZObj(1,16)], [ZmodnZObj(0,16), ZmodnZObj(1,16)]],[[ZmodnZObj(9,16), ZmodnZObj(0,16)], [ZmodnZObj(0,16), ZmodnZObj(1,16)]],[[ZmodnZObj(1,16), ZmodnZObj(2,16)], [ZmodnZObj(0,16), ZmodnZObj(1,16)]],[[ZmodnZObj(1,16), ZmodnZObj(8,16)], [ZmodnZObj(8,16), ZmodnZObj(9,16)]],[[ZmodnZObj(9,16), ZmodnZObj(0,16)], [ZmodnZObj(0,16), ZmodnZObj(9,16)]],[[ZmodnZObj(15,16), ZmodnZObj(0,16)], [ZmodnZObj(8,16), ZmodnZObj(15,16)]],[[ZmodnZObj(1,16), ZmodnZObj(4,16)], [ZmodnZObj(0,16), ZmodnZObj(1,16)]],[[ZmodnZObj(1,16), ZmodnZObj(8,16)], [ZmodnZObj(0,16), ZmodnZObj(1,16)]]]);
 
Copy content sage:MS = MatrixSpace(Integers(16), 2, 2) G = MatrixGroup([MS([[1, 1], [0, 1]]), MS([[9, 0], [0, 1]]), MS([[1, 2], [0, 1]]), MS([[1, 8], [8, 9]]), MS([[9, 0], [0, 9]]), MS([[15, 0], [8, 15]]), MS([[1, 4], [0, 1]]), MS([[1, 8], [0, 1]])])
 
$\left\langle \left(\begin{array}{rr} 13 & 35 \\ 14 & 9 \end{array}\right), \left(\begin{array}{rr} 25 & 0 \\ 0 & 25 \end{array}\right), \left(\begin{array}{rr} 13 & 10 \\ 4 & 5 \end{array}\right), \left(\begin{array}{rr} 7 & 0 \\ 0 & 7 \end{array}\right), \left(\begin{array}{rr} 17 & 24 \\ 24 & 17 \end{array}\right), \left(\begin{array}{rr} 1 & 24 \\ 0 & 1 \end{array}\right), \left(\begin{array}{rr} 25 & 0 \\ 0 & 1 \end{array}\right), \left(\begin{array}{rr} 1 & 12 \\ 0 & 1 \end{array}\right) \right\rangle \subseteq \GL_{2}(\Z/48\Z)$
Copy content comment:Define the group as a matrix group with coefficients in GLZN
 
Copy content magma:G := MatrixGroup< 2, Integers(48) | [[13, 35, 14, 9], [25, 0, 0, 25], [13, 10, 4, 5], [7, 0, 0, 7], [17, 24, 24, 17], [1, 24, 0, 1], [25, 0, 0, 1], [1, 12, 0, 1]] >;
 
Copy content gap:G := Group([[[ZmodnZObj(13,48), ZmodnZObj(35,48)], [ZmodnZObj(14,48), ZmodnZObj(9,48)]],[[ZmodnZObj(25,48), ZmodnZObj(0,48)], [ZmodnZObj(0,48), ZmodnZObj(25,48)]],[[ZmodnZObj(13,48), ZmodnZObj(10,48)], [ZmodnZObj(4,48), ZmodnZObj(5,48)]],[[ZmodnZObj(7,48), ZmodnZObj(0,48)], [ZmodnZObj(0,48), ZmodnZObj(7,48)]],[[ZmodnZObj(17,48), ZmodnZObj(24,48)], [ZmodnZObj(24,48), ZmodnZObj(17,48)]],[[ZmodnZObj(1,48), ZmodnZObj(24,48)], [ZmodnZObj(0,48), ZmodnZObj(1,48)]],[[ZmodnZObj(25,48), ZmodnZObj(0,48)], [ZmodnZObj(0,48), ZmodnZObj(1,48)]],[[ZmodnZObj(1,48), ZmodnZObj(12,48)], [ZmodnZObj(0,48), ZmodnZObj(1,48)]]]);
 
Copy content sage:MS = MatrixSpace(Integers(48), 2, 2) G = MatrixGroup([MS([[13, 35], [14, 9]]), MS([[25, 0], [0, 25]]), MS([[13, 10], [4, 5]]), MS([[7, 0], [0, 7]]), MS([[17, 24], [24, 17]]), MS([[1, 24], [0, 1]]), MS([[25, 0], [0, 1]]), MS([[1, 12], [0, 1]])])
 
Direct product: $C_2$ $\, \times\, $ $(C_2^2:\OD_{32})$
Semidirect product: $C_2^3$ $\,\rtimes\,$ $\OD_{32}$ $(C_2^3:C_{16})$ $\,\rtimes\,$ $C_2$ $(C_2\times C_{16})$ $\,\rtimes\,$ $C_2^3$ $(C_2^2\times \OD_{32})$ $\,\rtimes\,$ $C_2$ all 8
Trans. wreath product: not isomorphic to a non-trivial transitive wreath product
Non-split product: $C_2^5$ . $C_8$ $(C_2^2\times C_8)$ . $D_4$ $C_8$ . $(C_2^2\times D_4)$ $(C_2^4\times C_8)$ . $C_2$ all 36

Elements of the group are displayed as matrices in $\GL_{2}(\Z/{16}\Z)$.

Homology

Abelianization: $C_{2}^{3} \times C_{8} $
Copy content comment:The abelianization of the group
 
Copy content magma:quo< G | CommutatorSubgroup(G) >;
 
Copy content gap:FactorGroup(G, DerivedSubgroup(G));
 
Copy content sage:G.quotient(G.commutator())
 
Schur multiplier: $C_{2}^{6}$
Copy content comment:The Schur multiplier of the group
 
Copy content gap:AbelianInvariantsMultiplier(G);
 
Copy content sage:G.homology(2)
 
Copy content sage_gap:G.AbelianInvariantsMultiplier()
 
Commutator length: $1$
Copy content comment:The commutator length of the group
 
Copy content gap:CommutatorLength(G);
 
Copy content sage_gap:G.CommutatorLength()
 

Subgroups

Copy content comment:List of subgroups of the group
 
Copy content magma:Subgroups(G);
 
Copy content gap:AllSubgroups(G);
 
Copy content sage:G.subgroups()
 
Copy content sage_gap:G.AllSubgroups()
 

There are 1119 subgroups in 703 conjugacy classes, 287 normal (23 characteristic).

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

Special subgroups

Center: $Z \simeq$ $C_2^2\times C_8$ $G/Z \simeq$ $C_2^3$
Copy content comment:Center of the group
 
Copy content magma:Center(G);
 
Copy content gap:Center(G);
 
Copy content sage:G.center()
 
Copy content sage_gap:G.Center()
 
Commutator: $G' \simeq$ $C_2^2$ $G/G' \simeq$ $C_2^3\times C_8$
Copy content comment:Commutator subgroup of the group G
 
Copy content magma:CommutatorSubgroup(G);
 
Copy content gap:DerivedSubgroup(G);
 
Copy content sage:G.commutator()
 
Copy content sage_gap:G.DerivedSubgroup()
 
Frattini: $\Phi \simeq$ $C_2\times C_8$ $G/\Phi \simeq$ $C_2^4$
Copy content comment:Frattini subgroup of the group G
 
Copy content magma:FrattiniSubgroup(G);
 
Copy content gap:FrattiniSubgroup(G);
 
Copy content sage:G.frattini_subgroup()
 
Copy content sage_gap:G.FrattiniSubgroup()
 
Fitting: $\operatorname{Fit} \simeq$ $C_2^3:\OD_{32}$ $G/\operatorname{Fit} \simeq$ $C_1$
Copy content comment:Fitting subgroup of the group G
 
Copy content magma:FittingSubgroup(G);
 
Copy content gap:FittingSubgroup(G);
 
Copy content sage:G.fitting_subgroup()
 
Copy content sage_gap:G.FittingSubgroup()
 
Radical: $R \simeq$ $C_2^3:\OD_{32}$ $G/R \simeq$ $C_1$
Copy content comment:Radical of the group G
 
Copy content magma:Radical(G);
 
Copy content gap:SolvableRadical(G);
 
Copy content sage_gap:G.SolvableRadical()
 
Socle: $\operatorname{soc} \simeq$ $C_2^3$ $G/\operatorname{soc} \simeq$ $C_2^2\times C_8$
Copy content comment:Socle of the group G
 
Copy content magma:Socle(G);
 
Copy content gap:Socle(G);
 
Copy content sage:G.socle()
 
Copy content sage_gap:G.Socle()
 
2-Sylow subgroup: $P_{ 2 } \simeq$ $C_2^3:\OD_{32}$

Subgroup diagram and profile

For the default diagram, subgroups are sorted vertically by the number of prime divisors (counted with multiplicity) in their orders.
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Subgroup information

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

Series

Derived series $C_2^3:\OD_{32}$ $\rhd$ $C_2^2$ $\rhd$ $C_1$
Copy content comment:Derived series of the group GF
 
Copy content magma:DerivedSeries(G);
 
Copy content gap:DerivedSeriesOfGroup(G);
 
Copy content sage:G.derived_series()
 
Copy content sage_gap:G.DerivedSeriesOfGroup()
 
Chief series $C_2^3:\OD_{32}$ $\rhd$ $C_2^2:\OD_{32}$ $\rhd$ $C_2^2:C_{16}$ $\rhd$ $C_2\times C_{16}$ $\rhd$ $C_2\times C_8$ $\rhd$ $C_8$ $\rhd$ $C_4$ $\rhd$ $C_2$ $\rhd$ $C_1$
Copy content comment:Chief series of the group G
 
Copy content magma:ChiefSeries(G);
 
Copy content gap:ChiefSeries(G);
 
Copy content sage_gap:G.ChiefSeries()
 
Lower central series $C_2^3:\OD_{32}$ $\rhd$ $C_2^2$ $\rhd$ $C_1$
Copy content comment:The lower central series of the group G
 
Copy content magma:LowerCentralSeries(G);
 
Copy content gap:LowerCentralSeriesOfGroup(G);
 
Copy content sage:G.lower_central_series()
 
Copy content sage_gap:G.LowerCentralSeriesOfGroup()
 
Upper central series $C_1$ $\lhd$ $C_2^2\times C_8$ $\lhd$ $C_2^3:\OD_{32}$
Copy content comment:The upper central series of the group G
 
Copy content magma:UpperCentralSeries(G);
 
Copy content gap:UpperCentralSeriesOfGroup(G);
 
Copy content sage:G.upper_central_series()
 
Copy content sage_gap:G.UpperCentralSeriesOfGroup()
 

Supergroups

This group is a maximal subgroup of 29 larger groups in the database.

This group is a maximal quotient of 11 larger groups in the database.

Character theory

Copy content comment:Character table
 
Copy content magma:CharacterTable(G); // Output not guaranteed to exactly match the LMFDB table
 
Copy content gap:CharacterTable(G); # Output not guaranteed to exactly match the LMFDB table
 
Copy content sage:G.character_table() # Output not guaranteed to exactly match the LMFDB table
 
Copy content sage_gap:G.CharacterTable() # Output not guaranteed to exactly match the LMFDB table
 

Complex character table

See the $112 \times 112$ character table. Alternatively, you may search for characters of this group with desired properties.

Rational character table

See the $52 \times 52$ rational character table.