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Properties

Label 20.16.1906977314...0625.1
Degree $20$
Signature $[16, 2]$
Discriminant $3^{18}\cdot 5^{14}\cdot 73^{8}$
Root discriminant $46.13$
Ramified primes $3, 5, 73$
Class number $1$ (GRH)
Class group Trivial (GRH)
Galois group 20T277

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Show commands for: Magma / SageMath / Pari/GP

magma: R<x> := PolynomialRing(Rationals()); K<a> := NumberField(R![1, 16, -85, -222, 1458, -360, -6774, 8298, 7140, -16460, 961, 11792, -3027, -6714, 4740, -300, -651, 186, 11, -10, 1]);
 
sage: x = polygen(QQ); K.<a> = NumberField(x^20 - 10*x^19 + 11*x^18 + 186*x^17 - 651*x^16 - 300*x^15 + 4740*x^14 - 6714*x^13 - 3027*x^12 + 11792*x^11 + 961*x^10 - 16460*x^9 + 7140*x^8 + 8298*x^7 - 6774*x^6 - 360*x^5 + 1458*x^4 - 222*x^3 - 85*x^2 + 16*x + 1)
 
gp: K = bnfinit(x^20 - 10*x^19 + 11*x^18 + 186*x^17 - 651*x^16 - 300*x^15 + 4740*x^14 - 6714*x^13 - 3027*x^12 + 11792*x^11 + 961*x^10 - 16460*x^9 + 7140*x^8 + 8298*x^7 - 6774*x^6 - 360*x^5 + 1458*x^4 - 222*x^3 - 85*x^2 + 16*x + 1, 1)
 

Normalized defining polynomial

\( x^{20} - 10 x^{19} + 11 x^{18} + 186 x^{17} - 651 x^{16} - 300 x^{15} + 4740 x^{14} - 6714 x^{13} - 3027 x^{12} + 11792 x^{11} + 961 x^{10} - 16460 x^{9} + 7140 x^{8} + 8298 x^{7} - 6774 x^{6} - 360 x^{5} + 1458 x^{4} - 222 x^{3} - 85 x^{2} + 16 x + 1 \)

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

Invariants

Degree:  $20$
magma: Degree(K);
 
sage: K.degree()
 
gp: poldegree(K.pol)
 
Signature:  $[16, 2]$
magma: Signature(K);
 
sage: K.signature()
 
gp: K.sign
 
Discriminant:  \(1906977314212584211582086181640625=3^{18}\cdot 5^{14}\cdot 73^{8}\)
magma: Discriminant(Integers(K));
 
sage: K.disc()
 
gp: K.disc
 
Root discriminant:  $46.13$
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:  $3, 5, 73$
magma: PrimeDivisors(Discriminant(Integers(K)));
 
sage: K.disc().support()
 
gp: factor(abs(K.disc))[,1]~
 
This field is not Galois over $\Q$.
This is not a CM field.

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

$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $\frac{1}{3} a^{6} - \frac{1}{3} a^{3} - \frac{1}{3}$, $\frac{1}{3} a^{7} - \frac{1}{3} a^{4} - \frac{1}{3} a$, $\frac{1}{3} a^{8} - \frac{1}{3} a^{5} - \frac{1}{3} a^{2}$, $\frac{1}{3} a^{9} + \frac{1}{3} a^{3} - \frac{1}{3}$, $\frac{1}{6} a^{10} - \frac{1}{6} a^{9} - \frac{1}{6} a^{8} - \frac{1}{6} a^{6} + \frac{1}{6} a^{5} - \frac{1}{3} a^{4} - \frac{1}{3} a^{2} - \frac{1}{6} a - \frac{1}{6}$, $\frac{1}{6} a^{11} - \frac{1}{6} a^{8} - \frac{1}{6} a^{7} - \frac{1}{6} a^{5} - \frac{1}{3} a^{4} - \frac{1}{2} a^{2} - \frac{1}{3} a - \frac{1}{2}$, $\frac{1}{18} a^{12} + \frac{1}{18} a^{9} - \frac{1}{6} a^{8} - \frac{1}{18} a^{6} - \frac{1}{3} a^{5} + \frac{5}{18} a^{3} - \frac{1}{3} a^{2} - \frac{1}{2} a - \frac{1}{9}$, $\frac{1}{18} a^{13} + \frac{1}{18} a^{10} - \frac{1}{6} a^{9} - \frac{1}{18} a^{7} + \frac{5}{18} a^{4} + \frac{1}{3} a^{3} - \frac{1}{2} a^{2} - \frac{1}{9} a - \frac{1}{3}$, $\frac{1}{18} a^{14} + \frac{1}{18} a^{11} - \frac{1}{6} a^{9} + \frac{1}{9} a^{8} - \frac{1}{6} a^{6} + \frac{1}{9} a^{5} - \frac{1}{2} a^{3} + \frac{2}{9} a^{2} - \frac{1}{2} a - \frac{1}{6}$, $\frac{1}{18} a^{15} - \frac{1}{9} a^{9} - \frac{1}{6} a^{7} - \frac{1}{2} a^{5} + \frac{1}{6} a^{4} - \frac{1}{18} a^{3} - \frac{1}{2} a^{2} + \frac{1}{6} a - \frac{1}{18}$, $\frac{1}{54} a^{16} + \frac{1}{54} a^{15} - \frac{1}{54} a^{14} - \frac{1}{54} a^{12} - \frac{1}{54} a^{11} + \frac{2}{27} a^{10} - \frac{1}{9} a^{9} + \frac{2}{27} a^{8} + \frac{1}{18} a^{7} + \frac{7}{54} a^{6} - \frac{4}{27} a^{5} - \frac{8}{27} a^{4} - \frac{1}{9} a^{3} + \frac{13}{27} a^{2} + \frac{13}{27} a - \frac{10}{27}$, $\frac{1}{54} a^{17} + \frac{1}{54} a^{15} + \frac{1}{54} a^{14} - \frac{1}{54} a^{13} - \frac{2}{27} a^{11} - \frac{1}{54} a^{10} - \frac{5}{54} a^{9} - \frac{1}{54} a^{8} + \frac{2}{27} a^{7} - \frac{1}{9} a^{6} - \frac{17}{54} a^{5} + \frac{19}{54} a^{4} + \frac{11}{54} a^{3} - \frac{1}{3} a^{2} + \frac{13}{27} a + \frac{17}{54}$, $\frac{1}{51246} a^{18} - \frac{1}{5694} a^{17} - \frac{10}{25623} a^{16} + \frac{14}{1971} a^{15} - \frac{398}{25623} a^{14} + \frac{445}{17082} a^{13} - \frac{1087}{51246} a^{12} + \frac{2687}{51246} a^{11} - \frac{3947}{51246} a^{10} + \frac{463}{25623} a^{9} - \frac{1666}{25623} a^{8} - \frac{17}{2847} a^{7} + \frac{4007}{25623} a^{6} - \frac{5560}{25623} a^{5} + \frac{15527}{51246} a^{4} - \frac{35}{78} a^{3} + \frac{22163}{51246} a^{2} - \frac{2279}{25623} a - \frac{2164}{8541}$, $\frac{1}{5483322} a^{19} + \frac{22}{2741661} a^{18} + \frac{2365}{1827774} a^{17} + \frac{1345}{203086} a^{16} + \frac{2592}{101543} a^{15} - \frac{3904}{304629} a^{14} - \frac{3889}{913887} a^{13} + \frac{24061}{913887} a^{12} - \frac{56021}{1827774} a^{11} - \frac{170305}{5483322} a^{10} + \frac{654055}{5483322} a^{9} + \frac{379}{5694} a^{8} - \frac{73175}{913887} a^{7} - \frac{128455}{913887} a^{6} + \frac{17743}{70299} a^{5} - \frac{142147}{609258} a^{4} - \frac{7993}{23433} a^{3} - \frac{352085}{913887} a^{2} - \frac{956705}{2741661} a + \frac{13159}{5483322}$

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

Class group and class number

Trivial group, which has order $1$ (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:  $17$
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:  \( 9408087488.31 \) (assuming GRH)
magma: Regulator(K);
 
sage: K.regulator()
 
gp: K.reg
 

Galois group

20T277:

magma: GaloisGroup(K);
 
sage: K.galois_group(type='pari')
 
gp: polgalois(K.pol)
 
A non-solvable group of order 3840
The 48 conjugacy class representatives for t20n277
Character table for t20n277 is not computed

Intermediate fields

\(\Q(\sqrt{5}) \), 5.5.10791225.1, 10.10.582252685003125.1, 10.8.8733790275046875.1, 10.8.43668951375234375.1

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

Sibling fields

Degree 20 siblings: data not computed
Degree 40 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 ${\href{/LocalNumberField/2.10.0.1}{10} }^{2}$ R R ${\href{/LocalNumberField/7.10.0.1}{10} }^{2}$ ${\href{/LocalNumberField/11.10.0.1}{10} }^{2}$ ${\href{/LocalNumberField/13.4.0.1}{4} }^{2}{,}\,{\href{/LocalNumberField/13.2.0.1}{2} }^{6}$ ${\href{/LocalNumberField/17.10.0.1}{10} }^{2}$ ${\href{/LocalNumberField/19.5.0.1}{5} }^{4}$ ${\href{/LocalNumberField/23.4.0.1}{4} }^{4}{,}\,{\href{/LocalNumberField/23.2.0.1}{2} }^{2}$ ${\href{/LocalNumberField/29.10.0.1}{10} }^{2}$ ${\href{/LocalNumberField/31.3.0.1}{3} }^{4}{,}\,{\href{/LocalNumberField/31.1.0.1}{1} }^{8}$ ${\href{/LocalNumberField/37.6.0.1}{6} }^{2}{,}\,{\href{/LocalNumberField/37.2.0.1}{2} }^{4}$ ${\href{/LocalNumberField/41.3.0.1}{3} }^{4}{,}\,{\href{/LocalNumberField/41.2.0.1}{2} }^{2}{,}\,{\href{/LocalNumberField/41.1.0.1}{1} }^{4}$ ${\href{/LocalNumberField/43.10.0.1}{10} }^{2}$ ${\href{/LocalNumberField/47.10.0.1}{10} }^{2}$ ${\href{/LocalNumberField/53.6.0.1}{6} }^{2}{,}\,{\href{/LocalNumberField/53.2.0.1}{2} }^{4}$ ${\href{/LocalNumberField/59.4.0.1}{4} }^{4}{,}\,{\href{/LocalNumberField/59.2.0.1}{2} }^{2}$

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
$3$3.6.6.3$x^{6} + 3 x^{4} + 9$$3$$2$$6$$D_{6}$$[3/2]_{2}^{2}$
3.6.6.3$x^{6} + 3 x^{4} + 9$$3$$2$$6$$D_{6}$$[3/2]_{2}^{2}$
3.8.6.2$x^{8} + 4 x^{7} + 14 x^{6} + 28 x^{5} + 43 x^{4} + 44 x^{3} + 110 x^{2} + 92 x + 22$$4$$2$$6$$D_4$$[\ ]_{4}^{2}$
$5$5.4.2.1$x^{4} + 15 x^{2} + 100$$2$$2$$2$$C_2^2$$[\ ]_{2}^{2}$
5.8.6.2$x^{8} + 15 x^{4} + 100$$4$$2$$6$$C_4\times C_2$$[\ ]_{4}^{2}$
5.8.6.2$x^{8} + 15 x^{4} + 100$$4$$2$$6$$C_4\times C_2$$[\ ]_{4}^{2}$
$73$73.2.0.1$x^{2} - x + 11$$1$$2$$0$$C_2$$[\ ]^{2}$
73.2.0.1$x^{2} - x + 11$$1$$2$$0$$C_2$$[\ ]^{2}$
73.2.0.1$x^{2} - x + 11$$1$$2$$0$$C_2$$[\ ]^{2}$
73.2.0.1$x^{2} - x + 11$$1$$2$$0$$C_2$$[\ ]^{2}$
73.6.4.2$x^{6} - 73 x^{3} + 58619$$3$$2$$4$$C_6$$[\ ]_{3}^{2}$
73.6.4.2$x^{6} - 73 x^{3} + 58619$$3$$2$$4$$C_6$$[\ ]_{3}^{2}$