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Properties

Label 17.17.5974363388...0272.1
Degree $17$
Signature $[17, 0]$
Discriminant $2^{24}\cdot 3^{16}\cdot 17^{17}$
Root discriminant $127.20$
Ramified primes $2, 3, 17$
Class number $1$ (GRH)
Class group Trivial (GRH)
Galois group $F_{17}$ (as 17T5)

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Show commands for: Magma / SageMath / Pari/GP

magma: R<x> := PolynomialRing(Rationals()); K<a> := NumberField(R![-22482, 111537, 0, -446148, 0, 520506, 0, -272646, 0, 75735, 0, -11934, 0, 1071, 0, -51, 0, 1]);
 
sage: x = polygen(QQ); K.<a> = NumberField(x^17 - 51*x^15 + 1071*x^13 - 11934*x^11 + 75735*x^9 - 272646*x^7 + 520506*x^5 - 446148*x^3 + 111537*x - 22482)
 
gp: K = bnfinit(x^17 - 51*x^15 + 1071*x^13 - 11934*x^11 + 75735*x^9 - 272646*x^7 + 520506*x^5 - 446148*x^3 + 111537*x - 22482, 1)
 

Normalized defining polynomial

\( x^{17} - 51 x^{15} + 1071 x^{13} - 11934 x^{11} + 75735 x^{9} - 272646 x^{7} + 520506 x^{5} - 446148 x^{3} + 111537 x - 22482 \)

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

Invariants

Degree:  $17$
magma: Degree(K);
 
sage: K.degree()
 
gp: poldegree(K.pol)
 
Signature:  $[17, 0]$
magma: Signature(K);
 
sage: K.signature()
 
gp: K.sign
 
Discriminant:  \(597436338855434422471226103296950272=2^{24}\cdot 3^{16}\cdot 17^{17}\)
magma: Discriminant(Integers(K));
 
sage: K.disc()
 
gp: K.disc
 
Root discriminant:  $127.20$
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:  $2, 3, 17$
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 \(a\))

$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $a^{6}$, $a^{7}$, $a^{8}$, $\frac{1}{393} a^{9} - \frac{31}{131} a^{8} - \frac{9}{131} a^{7} - \frac{42}{131} a^{6} - \frac{50}{131} a^{5} + \frac{53}{131} a^{4} - \frac{8}{131} a^{3} + \frac{30}{131} a^{2} - \frac{19}{131} a - \frac{44}{131}$, $\frac{1}{393} a^{10} - \frac{10}{131} a^{8} + \frac{38}{131} a^{7} - \frac{26}{131} a^{6} - \frac{12}{131} a^{5} - \frac{57}{131} a^{4} - \frac{59}{131} a^{3} + \frac{20}{131} a^{2} + \frac{23}{131} a - \frac{31}{131}$, $\frac{1}{393} a^{11} + \frac{25}{131} a^{8} - \frac{34}{131} a^{7} + \frac{38}{131} a^{6} + \frac{15}{131} a^{5} - \frac{41}{131} a^{4} + \frac{42}{131} a^{3} + \frac{6}{131} a^{2} + \frac{54}{131} a - \frac{10}{131}$, $\frac{1}{393} a^{12} + \frac{64}{131} a^{8} + \frac{58}{131} a^{7} + \frac{21}{131} a^{6} + \frac{41}{131} a^{5} - \frac{3}{131} a^{4} - \frac{49}{131} a^{3} + \frac{31}{131} a^{2} - \frac{26}{131} a + \frac{25}{131}$, $\frac{1}{393} a^{13} - \frac{16}{131} a^{8} + \frac{46}{131} a^{7} - \frac{17}{131} a^{6} + \frac{34}{131} a^{5} - \frac{7}{131} a^{4} - \frac{5}{131} a^{3} - \frac{22}{131} a^{2} + \frac{5}{131} a + \frac{64}{131}$, $\frac{1}{393} a^{14} - \frac{1}{131} a^{8} - \frac{56}{131} a^{7} - \frac{17}{131} a^{6} - \frac{49}{131} a^{5} + \frac{50}{131} a^{4} - \frac{13}{131} a^{3} + \frac{4}{131} a^{2} - \frac{62}{131} a - \frac{16}{131}$, $\frac{1}{393} a^{15} - \frac{18}{131} a^{8} - \frac{44}{131} a^{7} - \frac{44}{131} a^{6} + \frac{31}{131} a^{5} + \frac{15}{131} a^{4} - \frac{20}{131} a^{3} + \frac{28}{131} a^{2} + \frac{58}{131} a - \frac{1}{131}$, $\frac{1}{393} a^{16} - \frac{15}{131} a^{8} - \frac{6}{131} a^{7} - \frac{10}{131} a^{6} - \frac{65}{131} a^{5} - \frac{40}{131} a^{4} - \frac{11}{131} a^{3} - \frac{25}{131} a^{2} + \frac{21}{131} a - \frac{18}{131}$

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:  $16$
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:  \( 13029132161200 \) (assuming GRH)
magma: Regulator(K);
 
sage: K.regulator()
 
gp: K.reg
 

Galois group

$F_{17}$ (as 17T5):

magma: GaloisGroup(K);
 
sage: K.galois_group(type='pari')
 
gp: polgalois(K.pol)
 
A solvable group of order 272
The 17 conjugacy class representatives for $F_{17}$
Character table for $F_{17}$

Intermediate fields

The extension is primitive: there are no intermediate fields between this field and $\Q$.

Frobenius cycle types

$p$ 2 3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59
Cycle type R R $16{,}\,{\href{/LocalNumberField/5.1.0.1}{1} }$ $16{,}\,{\href{/LocalNumberField/7.1.0.1}{1} }$ $16{,}\,{\href{/LocalNumberField/11.1.0.1}{1} }$ ${\href{/LocalNumberField/13.4.0.1}{4} }^{4}{,}\,{\href{/LocalNumberField/13.1.0.1}{1} }$ R ${\href{/LocalNumberField/19.8.0.1}{8} }^{2}{,}\,{\href{/LocalNumberField/19.1.0.1}{1} }$ $16{,}\,{\href{/LocalNumberField/23.1.0.1}{1} }$ $16{,}\,{\href{/LocalNumberField/29.1.0.1}{1} }$ $16{,}\,{\href{/LocalNumberField/31.1.0.1}{1} }$ $16{,}\,{\href{/LocalNumberField/37.1.0.1}{1} }$ $16{,}\,{\href{/LocalNumberField/41.1.0.1}{1} }$ ${\href{/LocalNumberField/43.8.0.1}{8} }^{2}{,}\,{\href{/LocalNumberField/43.1.0.1}{1} }$ ${\href{/LocalNumberField/47.4.0.1}{4} }^{4}{,}\,{\href{/LocalNumberField/47.1.0.1}{1} }$ ${\href{/LocalNumberField/53.8.0.1}{8} }^{2}{,}\,{\href{/LocalNumberField/53.1.0.1}{1} }$ ${\href{/LocalNumberField/59.8.0.1}{8} }^{2}{,}\,{\href{/LocalNumberField/59.1.0.1}{1} }$

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
$2$$\Q_{2}$$x + 1$$1$$1$$0$Trivial$[\ ]$
2.8.12.6$x^{8} + 2 x^{6} + 8 x^{4} + 80$$2$$4$$12$$C_8$$[3]^{4}$
2.8.12.6$x^{8} + 2 x^{6} + 8 x^{4} + 80$$2$$4$$12$$C_8$$[3]^{4}$
3Data not computed
17Data not computed