↑

Properties

Label 16.0.90517922705...1248.1
Degree $16$
Signature $[0, 8]$
Discriminant $2^{79}\cdot 23^{4}\cdot 31^{8}\cdot 89^{4}$
Root discriminant $1147.61$
Ramified primes $2, 23, 31, 89$
Class number $87532748800$ (GRH)
Class group $[2, 2, 2, 4, 4, 20, 34192480]$ (GRH)
Galois group $C_4.C_2^2\wr C_2$ (as 16T385)

Related objects

Downloads

Learn more about

Show commands for: Magma / SageMath / Pari/GP

magma: R<x> := PolynomialRing(Rationals()); K<a> := NumberField(R![5934553794724178, 0, 3874220981492640, 0, 490448945740944, 0, 16702070265472, 0, 221639065992, 0, 1304953472, 0, 3316496, 0, 3264, 0, 1]);
 
sage: x = polygen(QQ); K.<a> = NumberField(x^16 + 3264*x^14 + 3316496*x^12 + 1304953472*x^10 + 221639065992*x^8 + 16702070265472*x^6 + 490448945740944*x^4 + 3874220981492640*x^2 + 5934553794724178)
 
gp: K = bnfinit(x^16 + 3264*x^14 + 3316496*x^12 + 1304953472*x^10 + 221639065992*x^8 + 16702070265472*x^6 + 490448945740944*x^4 + 3874220981492640*x^2 + 5934553794724178, 1)
 

Normalized defining polynomial

\( x^{16} + 3264 x^{14} + 3316496 x^{12} + 1304953472 x^{10} + 221639065992 x^{8} + 16702070265472 x^{6} + 490448945740944 x^{4} + 3874220981492640 x^{2} + 5934553794724178 \)

magma: DefiningPolynomial(K);
 
sage: K.defining_polynomial()
 
gp: K.pol
 

Invariants

Degree:  $16$
magma: Degree(K);
 
sage: K.degree()
 
gp: poldegree(K.pol)
 
Signature:  $[0, 8]$
magma: Signature(K);
 
sage: K.signature()
 
gp: K.sign
 
Discriminant:  \(9051792270538665113859285354790637594769776181248=2^{79}\cdot 23^{4}\cdot 31^{8}\cdot 89^{4}\)
magma: Discriminant(Integers(K));
 
sage: K.disc()
 
gp: K.disc
 
Root discriminant:  $1147.61$
magma: Abs(Discriminant(Integers(K)))^(1/Degree(K));
 
sage: (K.disc().abs())^(1./K.degree())
 
gp: abs(K.disc)^(1/poldegree(K.pol))
 
Ramified primes:  $2, 23, 31, 89$
magma: PrimeDivisors(Discriminant(Integers(K)));
 
sage: K.disc().support()
 
gp: factor(abs(K.disc))[,1]~
 
This field is not Galois over $\Q$.
This is a CM field.

Integral basis (with respect to field generator \(a\))

$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $a^{6}$, $a^{7}$, $a^{8}$, $a^{9}$, $\frac{1}{2047} a^{10} - \frac{830}{2047} a^{8} + \frac{4}{23} a^{6} - \frac{840}{2047} a^{4} - \frac{251}{2047} a^{2}$, $\frac{1}{2047} a^{11} - \frac{830}{2047} a^{9} + \frac{4}{23} a^{7} - \frac{840}{2047} a^{5} - \frac{251}{2047} a^{3}$, $\frac{1}{1353437507} a^{12} - \frac{41770}{1353437507} a^{10} + \frac{5636154}{15207163} a^{8} + \frac{639438973}{1353437507} a^{6} + \frac{329104127}{1353437507} a^{4} + \frac{250066}{661181} a^{2} - \frac{44}{323}$, $\frac{1}{1353437507} a^{13} - \frac{41770}{1353437507} a^{11} + \frac{5636154}{15207163} a^{9} + \frac{639438973}{1353437507} a^{7} + \frac{329104127}{1353437507} a^{5} + \frac{250066}{661181} a^{3} - \frac{44}{323} a$, $\frac{1}{4185456580608101464912472566964221538160968427001} a^{14} - \frac{902213706513495423973493524769303357761}{4185456580608101464912472566964221538160968427001} a^{12} - \frac{1635473990870388489828565501903051996616083}{6718228861329215834530453558530050623051313687} a^{10} + \frac{489571319437045408814311032864547785653797708292}{4185456580608101464912472566964221538160968427001} a^{8} + \frac{1513856602975904888130787909795914025723002385230}{4185456580608101464912472566964221538160968427001} a^{6} - \frac{4924323865533973142721754770692166255397953}{17182171000841984231535686850460487526985457} a^{4} - \frac{417818009901061260023506129580768497846171}{998865827601463665633974956133267227997689} a^{2} + \frac{48888033826720832037808196549270996955}{487965719394950496157291136362123706887}$, $\frac{1}{54410935547905319043862143370534879996092589551013} a^{15} + \frac{310747883445468641290204243993088594325}{3200643267523842296697773139443228235064269973589} a^{13} + \frac{1231835668878142155756687755012087545138898}{87336975197279805848895896260890658099667077931} a^{11} + \frac{6080414127525653974754880299745134569493791677319}{54410935547905319043862143370534879996092589551013} a^{9} + \frac{14567559089080291443821652304723992424154554238858}{54410935547905319043862143370534879996092589551013} a^{7} + \frac{522669953529045798699952466146712081526986275}{3797259791186078515169386793951767743463785997} a^{5} + \frac{215266901566209823472401815660021590340700}{12985255758819027653241674429732473963969957} a^{3} - \frac{1547953345122080017616237410679102867378}{6343554352134356450044784772707608189531} a$

magma: IntegralBasis(K);
 
sage: K.integral_basis()
 
gp: K.zk
 

Class group and class number

$C_{2}\times C_{2}\times C_{2}\times C_{4}\times C_{4}\times C_{20}\times C_{34192480}$, which has order $87532748800$ (assuming GRH)

magma: ClassGroup(K);
 
sage: K.class_group().invariants()
 
gp: K.clgp
 

Unit group

magma: UK, f := UnitGroup(K);
 
sage: UK = K.unit_group()
 
Rank:  $7$
magma: UnitRank(K);
 
sage: UK.rank()
 
gp: K.fu
 
Torsion generator:  \( -1 \) (order $2$)
magma: K!f(TU.1) where TU,f is TorsionUnitGroup(K);
 
sage: UK.torsion_generator()
 
gp: K.tu[2]
 
Fundamental units:  Units are too long to display, but can be downloaded with other data for this field from 'Stored data to gp' link to the right (assuming GRH)
magma: [K!f(g): g in Generators(UK)];
 
sage: UK.fundamental_units()
 
gp: K.fu
 
Regulator:  \( 30445425.2472 \) (assuming GRH)
magma: Regulator(K);
 
sage: K.regulator()
 
gp: K.reg
 

Galois group

$C_4.C_2^2\wr C_2$ (as 16T385):

magma: GaloisGroup(K);
 
sage: K.galois_group(type='pari')
 
gp: polgalois(K.pol)
 
A solvable group of order 128
The 20 conjugacy class representatives for $C_4.C_2^2\wr C_2$
Character table for $C_4.C_2^2\wr C_2$

Intermediate fields

\(\Q(\sqrt{62}) \), 4.4.1968128.1, 8.8.1983246246084608.2

Fields in the database are given up to isomorphism. Isomorphic intermediate fields are shown with their multiplicities.

Sibling fields

Degree 32 siblings: data not computed
Arithmetically equvalently siblings: data not computed

Frobenius cycle types

$p$ 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59
Cycle type R $16$ $16$ ${\href{/LocalNumberField/7.2.0.1}{2} }^{8}$ $16$ ${\href{/LocalNumberField/13.2.0.1}{2} }^{7}{,}\,{\href{/LocalNumberField/13.1.0.1}{1} }^{2}$ ${\href{/LocalNumberField/17.4.0.1}{4} }^{4}$ ${\href{/LocalNumberField/19.2.0.1}{2} }^{7}{,}\,{\href{/LocalNumberField/19.1.0.1}{1} }^{2}$ R ${\href{/LocalNumberField/29.2.0.1}{2} }^{7}{,}\,{\href{/LocalNumberField/29.1.0.1}{1} }^{2}$ R ${\href{/LocalNumberField/37.4.0.1}{4} }^{2}{,}\,{\href{/LocalNumberField/37.2.0.1}{2} }^{3}{,}\,{\href{/LocalNumberField/37.1.0.1}{1} }^{2}$ ${\href{/LocalNumberField/41.4.0.1}{4} }^{4}$ $16$ ${\href{/LocalNumberField/47.4.0.1}{4} }^{4}$ ${\href{/LocalNumberField/53.2.0.1}{2} }^{7}{,}\,{\href{/LocalNumberField/53.1.0.1}{1} }^{2}$ ${\href{/LocalNumberField/59.4.0.1}{4} }^{2}{,}\,{\href{/LocalNumberField/59.2.0.1}{2} }^{3}{,}\,{\href{/LocalNumberField/59.1.0.1}{1} }^{2}$

In the table, R denotes a ramified prime. Cycle lengths which are repeated in a cycle type are indicated by exponents.

magma: p := 7; // to obtain a list of $[e_i,f_i]$ for the factorization of the ideal $p\mathcal{O}_K$:
 
magma: idealfactors := Factorization(p*Integers(K)); // get the data
 
magma: [<primefactor[2], Valuation(Norm(primefactor[1]), p)> : primefactor in idealfactors];
 
sage: p = 7; # to obtain a list of $[e_i,f_i]$ for the factorization of the ideal $p\mathcal{O}_K$:
 
sage: [(e, pr.norm().valuation(p)) for pr,e in K.factor(p)]
 
gp: p = 7; \\ to obtain a list of $[e_i,f_i]$ for the factorization of the ideal $p\mathcal{O}_K$:
 
gp: idealfactors = idealprimedec(K, p); \\ get the data
 
gp: vector(length(idealfactors), j, [idealfactors[j][3], idealfactors[j][4]])
 

Local algebras for ramified primes

$p$LabelPolynomial $e$ $f$ $c$ Galois group Slope content
2Data not computed
$23$$\Q_{23}$$x + 2$$1$$1$$0$Trivial$[\ ]$
$\Q_{23}$$x + 2$$1$$1$$0$Trivial$[\ ]$
$\Q_{23}$$x + 2$$1$$1$$0$Trivial$[\ ]$
$\Q_{23}$$x + 2$$1$$1$$0$Trivial$[\ ]$
$\Q_{23}$$x + 2$$1$$1$$0$Trivial$[\ ]$
$\Q_{23}$$x + 2$$1$$1$$0$Trivial$[\ ]$
$\Q_{23}$$x + 2$$1$$1$$0$Trivial$[\ ]$
$\Q_{23}$$x + 2$$1$$1$$0$Trivial$[\ ]$
23.2.1.2$x^{2} + 46$$2$$1$$1$$C_2$$[\ ]_{2}$
23.2.1.2$x^{2} + 46$$2$$1$$1$$C_2$$[\ ]_{2}$
23.2.1.2$x^{2} + 46$$2$$1$$1$$C_2$$[\ ]_{2}$
23.2.1.2$x^{2} + 46$$2$$1$$1$$C_2$$[\ ]_{2}$
$31$31.2.1.1$x^{2} - 31$$2$$1$$1$$C_2$$[\ ]_{2}$
31.2.1.1$x^{2} - 31$$2$$1$$1$$C_2$$[\ ]_{2}$
31.2.1.1$x^{2} - 31$$2$$1$$1$$C_2$$[\ ]_{2}$
31.2.1.1$x^{2} - 31$$2$$1$$1$$C_2$$[\ ]_{2}$
31.2.1.1$x^{2} - 31$$2$$1$$1$$C_2$$[\ ]_{2}$
31.2.1.1$x^{2} - 31$$2$$1$$1$$C_2$$[\ ]_{2}$
31.2.1.1$x^{2} - 31$$2$$1$$1$$C_2$$[\ ]_{2}$
31.2.1.1$x^{2} - 31$$2$$1$$1$$C_2$$[\ ]_{2}$
$89$89.2.0.1$x^{2} - x + 6$$1$$2$$0$$C_2$$[\ ]^{2}$
89.2.0.1$x^{2} - x + 6$$1$$2$$0$$C_2$$[\ ]^{2}$
89.2.0.1$x^{2} - x + 6$$1$$2$$0$$C_2$$[\ ]^{2}$
89.2.0.1$x^{2} - x + 6$$1$$2$$0$$C_2$$[\ ]^{2}$
89.4.2.1$x^{4} + 979 x^{2} + 285156$$2$$2$$2$$C_2^2$$[\ ]_{2}^{2}$
89.4.2.1$x^{4} + 979 x^{2} + 285156$$2$$2$$2$$C_2^2$$[\ ]_{2}^{2}$