Normalized defining polynomial
\( x^{16} - 8 x^{14} - 8 x^{13} + 16 x^{12} + 24 x^{11} - 80 x^{10} - 336 x^{9} - 314 x^{8} + 944 x^{7} + \cdots + 478 \)
Invariants
| Degree: | $16$ |
| |
| Signature: | $(4, 6)$ |
| |
| Discriminant: |
\(153177439332441840943104\)
\(\medspace = 2^{58}\cdot 3^{12}\)
|
| |
| Root discriminant: | \(28.12\) |
| |
| Galois root discriminant: | $2^{31/8}3^{3/4}\approx 33.44507500385779$ | ||
| Ramified primes: |
\(2\), \(3\)
|
| |
| Discriminant root field: | \(\Q\) | ||
| $\Aut(K/\Q)$: | $C_2^2$ |
| |
| This field is not Galois over $\Q$. | |||
| This is not a CM field. | |||
| This field has no CM subfields. | |||
Integral basis (with respect to field generator \(a\))
$1$, $a$, $a^{2}$, $a^{3}$, $a^{4}$, $a^{5}$, $a^{6}$, $a^{7}$, $a^{8}$, $a^{9}$, $a^{10}$, $a^{11}$, $a^{12}$, $\frac{1}{17}a^{13}-\frac{8}{17}a^{12}-\frac{5}{17}a^{11}+\frac{3}{17}a^{10}-\frac{4}{17}a^{9}-\frac{7}{17}a^{8}-\frac{5}{17}a^{7}+\frac{6}{17}a^{6}-\frac{8}{17}a^{5}-\frac{3}{17}a^{4}-\frac{5}{17}a^{3}+\frac{3}{17}a^{2}+\frac{6}{17}a-\frac{7}{17}$, $\frac{1}{20519}a^{14}-\frac{130}{20519}a^{13}+\frac{6598}{20519}a^{12}+\frac{8535}{20519}a^{11}-\frac{3430}{20519}a^{10}-\frac{2426}{20519}a^{9}+\frac{2736}{20519}a^{8}-\frac{5572}{20519}a^{7}-\frac{6435}{20519}a^{6}+\frac{3778}{20519}a^{5}-\frac{9125}{20519}a^{4}-\frac{5303}{20519}a^{3}-\frac{5324}{20519}a^{2}+\frac{7880}{20519}a+\frac{3285}{20519}$, $\frac{1}{77\cdots 63}a^{15}-\frac{64219694587202}{77\cdots 63}a^{14}-\frac{21\cdots 64}{77\cdots 63}a^{13}-\frac{72\cdots 51}{77\cdots 63}a^{12}-\frac{16\cdots 59}{77\cdots 63}a^{11}+\frac{32\cdots 55}{77\cdots 63}a^{10}-\frac{43\cdots 91}{77\cdots 63}a^{9}-\frac{653669446699727}{89\cdots 01}a^{8}-\frac{21\cdots 80}{77\cdots 63}a^{7}+\frac{95\cdots 28}{77\cdots 63}a^{6}-\frac{14\cdots 66}{77\cdots 63}a^{5}-\frac{23\cdots 75}{77\cdots 63}a^{4}+\frac{31\cdots 08}{77\cdots 63}a^{3}-\frac{22\cdots 39}{10\cdots 53}a^{2}+\frac{16\cdots 05}{77\cdots 63}a-\frac{22\cdots 22}{77\cdots 63}$
| Monogenic: | Not computed | |
| Index: | $1$ | |
| Inessential primes: | None |
Class group and class number
| Ideal class group: | Trivial group, which has order $1$ (assuming GRH) |
| |
| Narrow class group: | $C_{2}$, which has order $2$ (assuming GRH) |
|
Unit group
| Rank: | $9$ |
| |
| Torsion generator: |
\( -1 \)
(order $2$)
|
| |
| Fundamental units: |
$\frac{14823728735910}{26\cdots 67}a^{15}-\frac{955374050414374}{45\cdots 39}a^{14}-\frac{21\cdots 86}{45\cdots 39}a^{13}+\frac{71\cdots 94}{45\cdots 39}a^{12}+\frac{10\cdots 02}{45\cdots 39}a^{11}-\frac{18\cdots 06}{45\cdots 39}a^{10}-\frac{43\cdots 92}{45\cdots 39}a^{9}+\frac{15325873504787}{526080778454953}a^{8}+\frac{26\cdots 44}{45\cdots 39}a^{7}+\frac{42\cdots 14}{45\cdots 39}a^{6}-\frac{34\cdots 44}{45\cdots 39}a^{5}-\frac{19\cdots 57}{45\cdots 39}a^{4}-\frac{27\cdots 76}{45\cdots 39}a^{3}-\frac{19\cdots 02}{45\cdots 39}a^{2}-\frac{84\cdots 56}{45\cdots 39}a-\frac{50\cdots 43}{45\cdots 39}$, $\frac{9066839178560}{15\cdots 51}a^{15}-\frac{7815617982058}{15\cdots 51}a^{14}-\frac{66684261559068}{15\cdots 51}a^{13}-\frac{13481080027469}{15\cdots 51}a^{12}+\frac{161490267423636}{15\cdots 51}a^{11}+\frac{77413543420074}{15\cdots 51}a^{10}-\frac{812579894835296}{15\cdots 51}a^{9}-\frac{2710809714725}{1820348714377}a^{8}-\frac{721917614006508}{15\cdots 51}a^{7}+\frac{93\cdots 20}{15\cdots 51}a^{6}+\frac{23\cdots 08}{15\cdots 51}a^{5}+\frac{31\cdots 86}{15\cdots 51}a^{4}+\frac{27\cdots 32}{15\cdots 51}a^{3}+\frac{19\cdots 60}{15\cdots 51}a^{2}+\frac{74\cdots 32}{15\cdots 51}a+\frac{40\cdots 29}{15\cdots 51}$, $\frac{26\cdots 54}{77\cdots 63}a^{15}-\frac{509842498143137}{77\cdots 63}a^{14}-\frac{24\cdots 45}{77\cdots 63}a^{13}-\frac{17\cdots 92}{77\cdots 63}a^{12}+\frac{64\cdots 82}{77\cdots 63}a^{11}+\frac{47\cdots 20}{77\cdots 63}a^{10}-\frac{25\cdots 86}{77\cdots 63}a^{9}-\frac{10\cdots 22}{89\cdots 01}a^{8}-\frac{60\cdots 77}{77\cdots 63}a^{7}+\frac{31\cdots 18}{77\cdots 63}a^{6}+\frac{91\cdots 90}{77\cdots 63}a^{5}+\frac{12\cdots 91}{77\cdots 63}a^{4}+\frac{11\cdots 82}{77\cdots 63}a^{3}+\frac{71\cdots 16}{77\cdots 63}a^{2}+\frac{35\cdots 58}{77\cdots 63}a+\frac{16\cdots 73}{77\cdots 63}$, $\frac{15\cdots 38}{77\cdots 63}a^{15}+\frac{592394853707336}{10\cdots 53}a^{14}-\frac{21\cdots 09}{77\cdots 63}a^{13}-\frac{39\cdots 68}{77\cdots 63}a^{12}+\frac{61\cdots 54}{77\cdots 63}a^{11}+\frac{13\cdots 82}{77\cdots 63}a^{10}-\frac{20\cdots 02}{77\cdots 63}a^{9}-\frac{11\cdots 38}{89\cdots 01}a^{8}-\frac{10\cdots 49}{77\cdots 63}a^{7}+\frac{27\cdots 88}{77\cdots 63}a^{6}+\frac{10\cdots 16}{77\cdots 63}a^{5}+\frac{13\cdots 91}{77\cdots 63}a^{4}+\frac{76\cdots 74}{77\cdots 63}a^{3}+\frac{93\cdots 38}{77\cdots 63}a^{2}-\frac{11\cdots 70}{77\cdots 63}a-\frac{99\cdots 21}{77\cdots 63}$, $\frac{31\cdots 55}{77\cdots 63}a^{15}+\frac{10\cdots 76}{77\cdots 63}a^{14}-\frac{27\cdots 09}{77\cdots 63}a^{13}-\frac{37\cdots 57}{77\cdots 63}a^{12}+\frac{65\cdots 58}{77\cdots 63}a^{11}+\frac{12\cdots 65}{77\cdots 63}a^{10}-\frac{42\cdots 03}{10\cdots 53}a^{9}-\frac{14\cdots 51}{89\cdots 01}a^{8}-\frac{11\cdots 97}{77\cdots 63}a^{7}+\frac{35\cdots 63}{77\cdots 63}a^{6}+\frac{13\cdots 44}{77\cdots 63}a^{5}+\frac{19\cdots 12}{77\cdots 63}a^{4}+\frac{15\cdots 92}{77\cdots 63}a^{3}+\frac{95\cdots 09}{77\cdots 63}a^{2}+\frac{53\cdots 28}{77\cdots 63}a+\frac{18\cdots 39}{77\cdots 63}$, $\frac{63597246274404}{45\cdots 39}a^{15}-\frac{344757946047226}{45\cdots 39}a^{14}-\frac{329733203108437}{45\cdots 39}a^{13}-\frac{58474681236984}{45\cdots 39}a^{12}+\frac{62\cdots 41}{45\cdots 39}a^{11}+\frac{10\cdots 31}{45\cdots 39}a^{10}-\frac{14\cdots 67}{26\cdots 67}a^{9}-\frac{34778102006195}{526080778454953}a^{8}+\frac{11\cdots 81}{45\cdots 39}a^{7}+\frac{30\cdots 97}{45\cdots 39}a^{6}+\frac{25\cdots 92}{45\cdots 39}a^{5}-\frac{99\cdots 97}{45\cdots 39}a^{4}-\frac{34\cdots 64}{45\cdots 39}a^{3}-\frac{44\cdots 97}{45\cdots 39}a^{2}-\frac{35\cdots 34}{45\cdots 39}a-\frac{16\cdots 57}{45\cdots 39}$, $\frac{26\cdots 47}{77\cdots 63}a^{15}+\frac{58\cdots 85}{77\cdots 63}a^{14}-\frac{24\cdots 72}{77\cdots 63}a^{13}-\frac{25\cdots 65}{77\cdots 63}a^{12}+\frac{64\cdots 82}{77\cdots 63}a^{11}+\frac{94\cdots 00}{77\cdots 63}a^{10}-\frac{27\cdots 00}{77\cdots 63}a^{9}-\frac{11\cdots 72}{89\cdots 01}a^{8}-\frac{69\cdots 29}{77\cdots 63}a^{7}+\frac{33\cdots 23}{77\cdots 63}a^{6}+\frac{10\cdots 34}{77\cdots 63}a^{5}+\frac{13\cdots 55}{77\cdots 63}a^{4}+\frac{88\cdots 92}{77\cdots 63}a^{3}+\frac{31\cdots 94}{77\cdots 63}a^{2}+\frac{70\cdots 60}{77\cdots 63}a-\frac{68\cdots 83}{77\cdots 63}$, $\frac{19\cdots 46}{77\cdots 63}a^{15}+\frac{30\cdots 20}{77\cdots 63}a^{14}-\frac{25\cdots 16}{77\cdots 63}a^{13}-\frac{30\cdots 99}{77\cdots 63}a^{12}-\frac{27\cdots 63}{77\cdots 63}a^{11}+\frac{79\cdots 50}{77\cdots 63}a^{10}+\frac{24\cdots 23}{77\cdots 63}a^{9}-\frac{45\cdots 27}{89\cdots 01}a^{8}-\frac{99\cdots 84}{77\cdots 63}a^{7}-\frac{59\cdots 13}{77\cdots 63}a^{6}+\frac{46\cdots 02}{77\cdots 63}a^{5}+\frac{10\cdots 26}{77\cdots 63}a^{4}+\frac{11\cdots 68}{77\cdots 63}a^{3}+\frac{74\cdots 75}{77\cdots 63}a^{2}+\frac{42\cdots 50}{77\cdots 63}a+\frac{20\cdots 43}{77\cdots 63}$, $\frac{54\cdots 43}{77\cdots 63}a^{15}-\frac{73\cdots 92}{77\cdots 63}a^{14}-\frac{32\cdots 69}{77\cdots 63}a^{13}-\frac{62\cdots 10}{77\cdots 63}a^{12}+\frac{89\cdots 19}{77\cdots 63}a^{11}+\frac{26\cdots 61}{77\cdots 63}a^{10}-\frac{44\cdots 64}{77\cdots 63}a^{9}-\frac{14\cdots 12}{89\cdots 01}a^{8}-\frac{16\cdots 12}{77\cdots 63}a^{7}+\frac{51\cdots 00}{77\cdots 63}a^{6}+\frac{12\cdots 28}{77\cdots 63}a^{5}+\frac{16\cdots 53}{77\cdots 63}a^{4}+\frac{13\cdots 08}{77\cdots 63}a^{3}+\frac{76\cdots 67}{77\cdots 63}a^{2}+\frac{26\cdots 24}{77\cdots 63}a+\frac{94\cdots 37}{77\cdots 63}$
|
| |
| Regulator: | \( 283940.790469 \) (assuming GRH) |
| |
| Unit signature rank: | \( 3 \) (assuming GRH) |
Class number formula
\[ \begin{aligned}\lim_{s\to 1} (s-1)\zeta_K(s) =\mathstrut & \frac{2^{r_1}\cdot (2\pi)^{r_2}\cdot R\cdot h}{w\cdot\sqrt{|D|}}\cr \approx\mathstrut &\frac{2^{4}\cdot(2\pi)^{6}\cdot 283940.790469 \cdot 1}{2\cdot\sqrt{153177439332441840943104}}\cr\approx \mathstrut & 0.35710800178 \end{aligned}\] (assuming GRH)
Galois group
$C_2^4:Q_8$ (as 16T333):
| A solvable group of order 128 |
| The 26 conjugacy class representatives for $C_2^4:Q_8$ |
| Character table for $C_2^4:Q_8$ |
Intermediate fields
| \(\Q(\sqrt{2}) \), \(\Q(\sqrt{3}) \), \(\Q(\sqrt{6}) \), \(\Q(\zeta_{24})^+\), 8.2.24461180928.9, 8.8.12230590464.1, 8.2.2717908992.2 |
Fields in the database are given up to isomorphism. Isomorphic intermediate fields are shown with their multiplicities.
Sibling fields
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 | ${\href{/padicField/5.4.0.1}{4} }^{4}$ | ${\href{/padicField/7.4.0.1}{4} }^{4}$ | ${\href{/padicField/11.4.0.1}{4} }^{4}$ | ${\href{/padicField/13.4.0.1}{4} }^{4}$ | ${\href{/padicField/17.4.0.1}{4} }^{4}$ | ${\href{/padicField/19.4.0.1}{4} }^{4}$ | ${\href{/padicField/23.2.0.1}{2} }^{6}{,}\,{\href{/padicField/23.1.0.1}{1} }^{4}$ | ${\href{/padicField/29.4.0.1}{4} }^{4}$ | ${\href{/padicField/31.4.0.1}{4} }^{4}$ | ${\href{/padicField/37.4.0.1}{4} }^{4}$ | ${\href{/padicField/41.4.0.1}{4} }^{4}$ | ${\href{/padicField/43.4.0.1}{4} }^{4}$ | ${\href{/padicField/47.2.0.1}{2} }^{8}$ | ${\href{/padicField/53.4.0.1}{4} }^{4}$ | ${\href{/padicField/59.4.0.1}{4} }^{4}$ |
In the table, R denotes a ramified prime. Cycle lengths which are repeated in a cycle type are indicated by exponents.
Local algebras for ramified primes
| $p$ | Label | Polynomial | $e$ | $f$ | $c$ | Galois group | Slope content |
|---|---|---|---|---|---|---|---|
|
\(2\)
| 2.1.16.58n1.779 | $x^{16} + 8 x^{15} + 8 x^{14} + 4 x^{12} + 8 x^{11} + 2 x^{8} + 8 x^{6} + 20 x^{4} + 16 x^{3} + 8 x^{2} + 16 x + 14$ | $16$ | $1$ | $58$ | 16T333 | $$[2, 3, 3, \frac{7}{2}, 4, \frac{17}{4}]^{2}$$ |
|
\(3\)
| 3.4.4.12a1.3 | $x^{16} + 8 x^{15} + 24 x^{14} + 32 x^{13} + 24 x^{12} + 48 x^{11} + 96 x^{10} + 64 x^{9} + 24 x^{8} + 96 x^{7} + 96 x^{6} + 32 x^{4} + 64 x^{3} + 19$ | $4$ | $4$ | $12$ | $C_4:C_4$ | $$[\ ]_{4}^{4}$$ |