↑

Properties

Label 20.20.1853091914...0000.2
Degree $20$
Signature $[20, 0]$
Discriminant $2^{20}\cdot 5^{14}\cdot 6029^{7}$
Root discriminant $129.84$
Ramified primes $2, 5, 6029$
Class number $1$ (GRH)
Class group Trivial (GRH)
Galois group 20T375

Related objects

Downloads

Learn more about

Show commands for: Magma / SageMath / Pari/GP

magma: R<x> := PolynomialRing(Rationals()); K<a> := NumberField(R![219147162389, 0, -369631364129, 0, 185406068875, 0, -45584687570, 0, 6479901642, 0, -570295881, 0, 31752023, 0, -1103580, 0, 22695, 0, -244, 0, 1]);
 
sage: x = polygen(QQ); K.<a> = NumberField(x^20 - 244*x^18 + 22695*x^16 - 1103580*x^14 + 31752023*x^12 - 570295881*x^10 + 6479901642*x^8 - 45584687570*x^6 + 185406068875*x^4 - 369631364129*x^2 + 219147162389)
 
gp: K = bnfinit(x^20 - 244*x^18 + 22695*x^16 - 1103580*x^14 + 31752023*x^12 - 570295881*x^10 + 6479901642*x^8 - 45584687570*x^6 + 185406068875*x^4 - 369631364129*x^2 + 219147162389, 1)
 

Normalized defining polynomial

\( x^{20} - 244 x^{18} + 22695 x^{16} - 1103580 x^{14} + 31752023 x^{12} - 570295881 x^{10} + 6479901642 x^{8} - 45584687570 x^{6} + 185406068875 x^{4} - 369631364129 x^{2} + 219147162389 \)

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

Invariants

Degree:  $20$
magma: Degree(K);
 
sage: K.degree()
 
gp: poldegree(K.pol)
 
Signature:  $[20, 0]$
magma: Signature(K);
 
sage: K.signature()
 
gp: K.sign
 
Discriminant:  \(1853091914135141046229493177600000000000000=2^{20}\cdot 5^{14}\cdot 6029^{7}\)
magma: Discriminant(Integers(K));
 
sage: K.disc()
 
gp: K.disc
 
Root discriminant:  $129.84$
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:  $2, 5, 6029$
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 \(a\))

$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $a^{6}$, $a^{7}$, $a^{8}$, $a^{9}$, $a^{10}$, $a^{11}$, $a^{12}$, $a^{13}$, $a^{14}$, $a^{15}$, $\frac{1}{548639} a^{16} + \frac{180626}{548639} a^{14} - \frac{103914}{548639} a^{12} - \frac{3}{6029} a^{10} - \frac{129329}{548639} a^{8} - \frac{223786}{548639} a^{6} + \frac{4790}{548639} a^{4} - \frac{136021}{548639} a^{2} - \frac{18}{91}$, $\frac{1}{548639} a^{17} + \frac{180626}{548639} a^{15} - \frac{103914}{548639} a^{13} - \frac{3}{6029} a^{11} - \frac{129329}{548639} a^{9} - \frac{223786}{548639} a^{7} + \frac{4790}{548639} a^{5} - \frac{136021}{548639} a^{3} - \frac{18}{91} a$, $\frac{1}{16680716114782671793867374676086101064541} a^{18} - \frac{1432066893067648494427060748899989}{2382959444968953113409624953726585866363} a^{16} - \frac{1193163163407855474085485962355712362134}{16680716114782671793867374676086101064541} a^{14} - \frac{7275879975796788565788718721858225798798}{16680716114782671793867374676086101064541} a^{12} - \frac{3616625996112202540604825381550202062371}{16680716114782671793867374676086101064541} a^{10} + \frac{5481683900506090140722159922162484952810}{16680716114782671793867374676086101064541} a^{8} - \frac{129163778098748666189671050223662164062}{1283132008829436291835951898160469312657} a^{6} - \frac{470565857798612587761266231707709199300}{2382959444968953113409624953726585866363} a^{4} - \frac{875479943582479049878123374897339072}{2766746743204954684668663903812589329} a^{2} - \frac{150326034737092753512701320726319}{458906409554644996627743225047701}$, $\frac{1}{16680716114782671793867374676086101064541} a^{19} - \frac{1432066893067648494427060748899989}{2382959444968953113409624953726585866363} a^{17} - \frac{1193163163407855474085485962355712362134}{16680716114782671793867374676086101064541} a^{15} - \frac{7275879975796788565788718721858225798798}{16680716114782671793867374676086101064541} a^{13} - \frac{3616625996112202540604825381550202062371}{16680716114782671793867374676086101064541} a^{11} + \frac{5481683900506090140722159922162484952810}{16680716114782671793867374676086101064541} a^{9} - \frac{129163778098748666189671050223662164062}{1283132008829436291835951898160469312657} a^{7} - \frac{470565857798612587761266231707709199300}{2382959444968953113409624953726585866363} a^{5} - \frac{875479943582479049878123374897339072}{2766746743204954684668663903812589329} a^{3} - \frac{150326034737092753512701320726319}{458906409554644996627743225047701} a$

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:  $19$
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:  \( 453280136478000 \) (assuming GRH)
magma: Regulator(K);
 
sage: K.regulator()
 
gp: K.reg
 

Galois group

20T375:

magma: GaloisGroup(K);
 
sage: K.galois_group(type='pari')
 
gp: polgalois(K.pol)
 
A non-solvable group of order 7680
The 48 conjugacy class representatives for t20n375
Character table for t20n375 is not computed

Intermediate fields

\(\Q(\sqrt{5}) \), 5.5.753625.1, 10.10.2839753203125.1

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

Sibling fields

Degree 20 sibling: 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 R $20$ R ${\href{/LocalNumberField/7.4.0.1}{4} }^{4}{,}\,{\href{/LocalNumberField/7.2.0.1}{2} }^{2}$ ${\href{/LocalNumberField/11.5.0.1}{5} }^{4}$ ${\href{/LocalNumberField/13.4.0.1}{4} }^{2}{,}\,{\href{/LocalNumberField/13.2.0.1}{2} }^{6}$ ${\href{/LocalNumberField/17.4.0.1}{4} }^{5}$ ${\href{/LocalNumberField/19.10.0.1}{10} }^{2}$ ${\href{/LocalNumberField/23.4.0.1}{4} }^{4}{,}\,{\href{/LocalNumberField/23.2.0.1}{2} }^{2}$ ${\href{/LocalNumberField/29.6.0.1}{6} }{,}\,{\href{/LocalNumberField/29.4.0.1}{4} }^{2}{,}\,{\href{/LocalNumberField/29.3.0.1}{3} }^{2}$ ${\href{/LocalNumberField/31.4.0.1}{4} }^{4}{,}\,{\href{/LocalNumberField/31.2.0.1}{2} }{,}\,{\href{/LocalNumberField/31.1.0.1}{1} }^{2}$ ${\href{/LocalNumberField/37.4.0.1}{4} }^{3}{,}\,{\href{/LocalNumberField/37.2.0.1}{2} }^{4}$ ${\href{/LocalNumberField/41.4.0.1}{4} }^{2}{,}\,{\href{/LocalNumberField/41.2.0.1}{2} }^{6}$ ${\href{/LocalNumberField/43.6.0.1}{6} }^{2}{,}\,{\href{/LocalNumberField/43.2.0.1}{2} }^{4}$ ${\href{/LocalNumberField/47.4.0.1}{4} }{,}\,{\href{/LocalNumberField/47.2.0.1}{2} }^{8}$ ${\href{/LocalNumberField/53.4.0.1}{4} }^{4}{,}\,{\href{/LocalNumberField/53.2.0.1}{2} }^{2}$ ${\href{/LocalNumberField/59.4.0.1}{4} }^{4}{,}\,{\href{/LocalNumberField/59.2.0.1}{2} }{,}\,{\href{/LocalNumberField/59.1.0.1}{1} }^{2}$

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
$5$5.4.2.1$x^{4} + 15 x^{2} + 100$$2$$2$$2$$C_2^2$$[\ ]_{2}^{2}$
5.4.2.1$x^{4} + 15 x^{2} + 100$$2$$2$$2$$C_2^2$$[\ ]_{2}^{2}$
5.12.10.1$x^{12} + 6 x^{11} + 27 x^{10} + 80 x^{9} + 195 x^{8} + 366 x^{7} + 571 x^{6} + 702 x^{5} + 1005 x^{4} + 1140 x^{3} + 357 x^{2} - 138 x + 44$$6$$2$$10$$D_6$$[\ ]_{6}^{2}$
6029Data not computed