Finite Group Databasebeta

D257⋊M16 #22551677

order8224
automorphism?
homologyAbelianization (H1) = C22×C4 · Schur multiplier (H2) = C22

Aliases

unambiguous semidirect productD257⋊M16

Splittings

SylowC257 ⋊ C2×M16

Subgroups

subgroupG/H
centerC4C2×#11759967
commutator, socleC2×C257C22×C4
FrattiniC2C22×#11759967
FittingC2×C4×C257C4
hypercenterC2×C4#11759967
hypocenterC257C2×M16
LCSG ▷ C2×C257 ▷ C257
UCSC1 ◁ C4 ◁ C2×C4

68 conjugacy classes of subgroups.

Full subgroup data →

Presentation

Polycyclic presentation:

2^5,257|a^2=d,d^2=e,b^a=be,f^a=f^241,f^c=f^256,f^d=f^256

Conjugacy classes & character table

532 conjugacy classes — view the full character table.

Relationships

maximal subgroup of#30657604, #30657606, #30657608, …
maximal normal subgroup of#30657604, #30657606, #30657608, …
maximal quotient of#30657696, C4×#16861627, C4×#16861628, …

GAP

Construct this group in GAP via the SmallGroups library:

gap> SmallGroup(8224, 231);