Finite Group Databasebeta

D257⋊#100 #30657720

order16448
automorphism?
homologyAbelianization (H1) = C22×C4 · Schur multiplier (H2) = C23

Aliases

unambiguous semidirect productD257⋊#100

Splittings

SylowC257 ⋊ C2×#100

Subgroups

subgroupG/H
centerC2C2×C22⋊#11759967
commutatorC22×C257C22×C4
FrattiniC22C22×#11759967
FittingC2×D4×C257C4
socleC2×C257C2×C22⋊C4
prime radicalC2×D4×D257C2
cosocleC2×Dic257C23
hypercenterC2×D4#11759967
hypocenterC257C2×#100
LCSG ▷ C22×C257 ▷ C2×C257 ▷ C257
UCSC1 ◁ C2 ◁ C2×C4 ◁ C2×D4

186 conjugacy classes of subgroups.

Full subgroup data →

Presentation

transitive degreeμt(G) = 2056

Polycyclic presentation:

2^6,257|a^2=e,e^2=f,b^a=bd,d^a=df,g^a=g^241,e^b=ef,g^c=g^256,g^e=g^256

Conjugacy classes & character table

662 conjugacy classes — view the full character table.

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(16448, 1532);