# Properties

 Label 20.0.20865144565...0625.1 Degree $20$ Signature $[0, 10]$ Discriminant $3^{10}\cdot 5^{8}\cdot 67^{6}$ Root discriminant $11.64$ Ramified primes $3, 5, 67$ Class number $1$ Class group Trivial Galois Group 20T288

# Related objects

Show commands for: Magma / SageMath / Pari/GP

magma: R<x> := PolynomialRing(Rationals()); K<a> := NumberField(R![1, -3, 4, -11, 22, -24, 35, -47, 42, -52, 65, -62, 64, -60, 45, -29, 19, -14, 9, -4, 1]);
sage: x = polygen(QQ); K.<a> = NumberField(x^20 - 4*x^19 + 9*x^18 - 14*x^17 + 19*x^16 - 29*x^15 + 45*x^14 - 60*x^13 + 64*x^12 - 62*x^11 + 65*x^10 - 52*x^9 + 42*x^8 - 47*x^7 + 35*x^6 - 24*x^5 + 22*x^4 - 11*x^3 + 4*x^2 - 3*x + 1)
gp: K = bnfinit(x^20 - 4*x^19 + 9*x^18 - 14*x^17 + 19*x^16 - 29*x^15 + 45*x^14 - 60*x^13 + 64*x^12 - 62*x^11 + 65*x^10 - 52*x^9 + 42*x^8 - 47*x^7 + 35*x^6 - 24*x^5 + 22*x^4 - 11*x^3 + 4*x^2 - 3*x + 1, 1)

## Normalizeddefining polynomial

$$x^{20}$$ $$\mathstrut -\mathstrut 4 x^{19}$$ $$\mathstrut +\mathstrut 9 x^{18}$$ $$\mathstrut -\mathstrut 14 x^{17}$$ $$\mathstrut +\mathstrut 19 x^{16}$$ $$\mathstrut -\mathstrut 29 x^{15}$$ $$\mathstrut +\mathstrut 45 x^{14}$$ $$\mathstrut -\mathstrut 60 x^{13}$$ $$\mathstrut +\mathstrut 64 x^{12}$$ $$\mathstrut -\mathstrut 62 x^{11}$$ $$\mathstrut +\mathstrut 65 x^{10}$$ $$\mathstrut -\mathstrut 52 x^{9}$$ $$\mathstrut +\mathstrut 42 x^{8}$$ $$\mathstrut -\mathstrut 47 x^{7}$$ $$\mathstrut +\mathstrut 35 x^{6}$$ $$\mathstrut -\mathstrut 24 x^{5}$$ $$\mathstrut +\mathstrut 22 x^{4}$$ $$\mathstrut -\mathstrut 11 x^{3}$$ $$\mathstrut +\mathstrut 4 x^{2}$$ $$\mathstrut -\mathstrut 3 x$$ $$\mathstrut +\mathstrut 1$$

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

## Invariants

 Degree: $20$ magma: Degree(K); sage: K.degree() gp: poldegree(K.pol) Signature: $[0, 10]$ magma: Signature(K); sage: K.signature() gp: K.sign Discriminant: $$2086514456522375390625=3^{10}\cdot 5^{8}\cdot 67^{6}$$ magma: Discriminant(K); sage: K.disc() gp: K.disc Root discriminant: $11.64$ magma: Abs(Discriminant(K))^(1/Degree(K)); sage: (K.disc().abs())^(1./K.degree()) gp: abs(K.disc)^(1/poldegree(K.pol)) Ramified primes: $3, 5, 67$ magma: PrimeDivisors(Discriminant(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 $$a$$)

$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $a^{6}$, $a^{7}$, $a^{8}$, $a^{9}$, $a^{10}$, $a^{11}$, $a^{12}$, $a^{13}$, $a^{14}$, $a^{15}$, $\frac{1}{3} a^{16} - \frac{1}{3} a^{15} + \frac{1}{3} a^{14} + \frac{1}{3} a^{12} - \frac{1}{3} a^{11} - \frac{1}{3} a^{9} + \frac{1}{3} a^{7} - \frac{1}{3} a^{6} + \frac{1}{3} a^{5} - \frac{1}{3} a^{4} + \frac{1}{3} a^{3} - \frac{1}{3} a^{2} + \frac{1}{3}$, $\frac{1}{21} a^{17} + \frac{1}{7} a^{16} + \frac{3}{7} a^{15} + \frac{10}{21} a^{14} + \frac{1}{3} a^{13} - \frac{3}{7} a^{12} + \frac{5}{21} a^{11} - \frac{4}{21} a^{10} + \frac{2}{21} a^{9} - \frac{5}{21} a^{8} - \frac{1}{7} a^{7} + \frac{1}{7} a^{6} + \frac{2}{7} a^{5} + \frac{3}{7} a^{3} + \frac{8}{21} a^{2} + \frac{1}{21} a - \frac{5}{21}$, $\frac{1}{105} a^{18} - \frac{1}{15} a^{16} - \frac{52}{105} a^{15} + \frac{11}{35} a^{14} - \frac{2}{7} a^{13} - \frac{38}{105} a^{12} - \frac{4}{35} a^{11} + \frac{2}{15} a^{10} - \frac{4}{105} a^{9} - \frac{2}{7} a^{8} + \frac{47}{105} a^{7} + \frac{5}{21} a^{6} - \frac{4}{105} a^{5} - \frac{26}{105} a^{4} + \frac{16}{105} a^{3} + \frac{47}{105} a^{2} - \frac{29}{105} a - \frac{34}{105}$, $\frac{1}{207795} a^{19} - \frac{338}{207795} a^{18} + \frac{14}{29685} a^{17} - \frac{7617}{69265} a^{16} + \frac{23498}{69265} a^{15} - \frac{66169}{207795} a^{14} - \frac{86078}{207795} a^{13} - \frac{1626}{69265} a^{12} - \frac{4050}{13853} a^{11} - \frac{55661}{207795} a^{10} - \frac{22391}{69265} a^{9} - \frac{89248}{207795} a^{8} - \frac{103711}{207795} a^{7} - \frac{60359}{207795} a^{6} - \frac{15964}{207795} a^{5} - \frac{14997}{69265} a^{4} - \frac{49006}{207795} a^{3} + \frac{7457}{41559} a^{2} + \frac{18691}{69265} a - \frac{70373}{207795}$

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

## Class group and class number

Trivial group, which has order $1$

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

## Unit group

magma: UK, f := UnitGroup(K);
sage: UK = K.unit_group()
 Rank: $9$ magma: UnitRank(K); sage: UK.rank() gp: K.fu Torsion generator: $$-\frac{446380}{41559} a^{19} + \frac{507763}{13853} a^{18} - \frac{3138139}{41559} a^{17} + \frac{637280}{5937} a^{16} - \frac{5973073}{41559} a^{15} + \frac{1369838}{5937} a^{14} - \frac{4883015}{13853} a^{13} + \frac{18497107}{41559} a^{12} - \frac{18213646}{41559} a^{11} + \frac{5870395}{13853} a^{10} - \frac{19242005}{41559} a^{9} + \frac{12423695}{41559} a^{8} - \frac{574441}{1979} a^{7} + \frac{4774813}{13853} a^{6} - \frac{2508248}{13853} a^{5} + \frac{6669826}{41559} a^{4} - \frac{6152458}{41559} a^{3} + \frac{477231}{13853} a^{2} - \frac{1074751}{41559} a + \frac{788960}{41559}$$ (order $6$) 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 magma: [K!f(g): g in Generators(UK)]; sage: UK.fundamental_units() gp: K.fu Regulator: $$527.926443922$$ magma: Regulator(K); sage: K.regulator() gp: K.reg

## Galois group

magma: GaloisGroup(K);
sage: K.galois_group(type='pari')
gp: polgalois(K.pol)
 A non-solvable group of order 3840 The 36 conjugacy class representatives for t20n288 Character table for t20n288 is not computed

## Intermediate fields

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

## Sibling fields

 Degree 10 siblings: data not computed Degree 20 siblings: data not computed Degree 30 siblings: data not computed Degree 32 siblings: data not computed Degree 40 siblings: data not computed

## Frobenius cycle types

 $p$ Cycle type 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 ${\href{/LocalNumberField/2.10.0.1}{10} }^{2}$ R R ${\href{/LocalNumberField/7.4.0.1}{4} }^{2}{,}\,{\href{/LocalNumberField/7.3.0.1}{3} }^{4}$ ${\href{/LocalNumberField/11.10.0.1}{10} }^{2}$ ${\href{/LocalNumberField/13.4.0.1}{4} }^{4}{,}\,{\href{/LocalNumberField/13.2.0.1}{2} }^{2}$ ${\href{/LocalNumberField/17.8.0.1}{8} }^{2}{,}\,{\href{/LocalNumberField/17.2.0.1}{2} }^{2}$ ${\href{/LocalNumberField/19.5.0.1}{5} }^{4}$ ${\href{/LocalNumberField/23.4.0.1}{4} }^{4}{,}\,{\href{/LocalNumberField/23.2.0.1}{2} }^{2}$ ${\href{/LocalNumberField/29.8.0.1}{8} }^{2}{,}\,{\href{/LocalNumberField/29.2.0.1}{2} }^{2}$ ${\href{/LocalNumberField/31.6.0.1}{6} }^{2}{,}\,{\href{/LocalNumberField/31.2.0.1}{2} }^{4}$ ${\href{/LocalNumberField/37.5.0.1}{5} }^{4}$ ${\href{/LocalNumberField/41.10.0.1}{10} }^{2}$ ${\href{/LocalNumberField/43.4.0.1}{4} }^{4}{,}\,{\href{/LocalNumberField/43.2.0.1}{2} }^{2}$ ${\href{/LocalNumberField/47.4.0.1}{4} }^{4}{,}\,{\href{/LocalNumberField/47.2.0.1}{2} }^{2}$ ${\href{/LocalNumberField/53.6.0.1}{6} }^{2}{,}\,{\href{/LocalNumberField/53.2.0.1}{2} }^{4}$ ${\href{/LocalNumberField/59.8.0.1}{8} }^{2}{,}\,{\href{/LocalNumberField/59.2.0.1}{2} }^{2}$

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$3.4.2.1$x^{4} + 9 x^{2} + 36$$2$$2$$2$$C_2^2$$[\ ]_{2}^{2} 3.4.2.1x^{4} + 9 x^{2} + 36$$2$$2$$2$$C_2^2$$[\ ]_{2}^{2}$
3.12.6.2$x^{12} + 108 x^{6} - 243 x^{2} + 2916$$2$$6$$6$$C_6\times C_2$$[\ ]_{2}^{6} 55.4.0.1x^{4} + x^{2} - 2 x + 2$$1$$4$$0$$C_4$$[\ ]^{4}$
5.4.0.1$x^{4} + x^{2} - 2 x + 2$$1$$4$$0$$C_4$$[\ ]^{4} 5.6.4.1x^{6} + 25 x^{3} + 200$$3$$2$$4$$S_3$$[\ ]_{3}^{2}$
5.6.4.1$x^{6} + 25 x^{3} + 200$$3$$2$$4$$S_3$$[\ ]_{3}^{2}$
67Data not computed