Properties

Label 2-21-1.1-c29-0-21
Degree $2$
Conductor $21$
Sign $1$
Analytic cond. $111.883$
Root an. cond. $10.5775$
Motivic weight $29$
Arithmetic yes
Rational no
Primitive yes
Self-dual yes
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  + 4.44e4·2-s − 4.78e6·3-s + 1.44e9·4-s + 4.26e9·5-s − 2.12e11·6-s + 6.78e11·7-s + 4.01e13·8-s + 2.28e13·9-s + 1.89e14·10-s + 3.33e13·11-s − 6.89e15·12-s + 2.47e16·13-s + 3.01e16·14-s − 2.04e16·15-s + 1.01e18·16-s + 3.50e17·17-s + 1.01e18·18-s − 4.86e18·19-s + 6.14e18·20-s − 3.24e18·21-s + 1.48e18·22-s − 6.35e19·23-s − 1.92e20·24-s − 1.68e20·25-s + 1.10e21·26-s − 1.09e20·27-s + 9.77e20·28-s + ⋯
L(s)  = 1  + 1.91·2-s − 0.577·3-s + 2.68·4-s + 0.312·5-s − 1.10·6-s + 0.377·7-s + 3.23·8-s + 0.333·9-s + 0.600·10-s + 0.0264·11-s − 1.54·12-s + 1.74·13-s + 0.725·14-s − 0.180·15-s + 3.51·16-s + 0.504·17-s + 0.639·18-s − 1.39·19-s + 0.839·20-s − 0.218·21-s + 0.0508·22-s − 1.14·23-s − 1.86·24-s − 0.902·25-s + 3.34·26-s − 0.192·27-s + 1.01·28-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 21 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & \, \Lambda(30-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 21 ^{s/2} \, \Gamma_{\C}(s+29/2) \, L(s)\cr =\mathstrut & \, \Lambda(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(21\)    =    \(3 \cdot 7\)
Sign: $1$
Analytic conductor: \(111.883\)
Root analytic conductor: \(10.5775\)
Motivic weight: \(29\)
Rational: no
Arithmetic: yes
Character: Trivial
Primitive: yes
Self-dual: yes
Analytic rank: \(0\)
Selberg data: \((2,\ 21,\ (\ :29/2),\ 1)\)

Particular Values

\(L(15)\) \(\approx\) \(8.806383893\)
\(L(\frac12)\) \(\approx\) \(8.806383893\)
\(L(\frac{31}{2})\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad3 \( 1 + 4.78e6T \)
7 \( 1 - 6.78e11T \)
good2 \( 1 - 4.44e4T + 5.36e8T^{2} \)
5 \( 1 - 4.26e9T + 1.86e20T^{2} \)
11 \( 1 - 3.33e13T + 1.58e30T^{2} \)
13 \( 1 - 2.47e16T + 2.01e32T^{2} \)
17 \( 1 - 3.50e17T + 4.81e35T^{2} \)
19 \( 1 + 4.86e18T + 1.21e37T^{2} \)
23 \( 1 + 6.35e19T + 3.09e39T^{2} \)
29 \( 1 - 1.29e21T + 2.56e42T^{2} \)
31 \( 1 - 6.01e21T + 1.77e43T^{2} \)
37 \( 1 - 1.93e22T + 3.00e45T^{2} \)
41 \( 1 - 1.89e23T + 5.89e46T^{2} \)
43 \( 1 - 6.08e23T + 2.34e47T^{2} \)
47 \( 1 + 5.68e23T + 3.09e48T^{2} \)
53 \( 1 + 1.42e25T + 1.00e50T^{2} \)
59 \( 1 - 7.70e25T + 2.26e51T^{2} \)
61 \( 1 + 4.19e25T + 5.95e51T^{2} \)
67 \( 1 + 4.17e26T + 9.04e52T^{2} \)
71 \( 1 - 6.10e25T + 4.85e53T^{2} \)
73 \( 1 - 5.13e26T + 1.08e54T^{2} \)
79 \( 1 - 3.72e27T + 1.07e55T^{2} \)
83 \( 1 - 3.79e27T + 4.50e55T^{2} \)
89 \( 1 - 9.29e27T + 3.40e56T^{2} \)
97 \( 1 + 7.85e28T + 4.13e57T^{2} \)
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   \(L(s) = \displaystyle\prod_p \ \prod_{j=1}^{2} (1 - \alpha_{j,p}\, p^{-s})^{-1}\)

Imaginary part of the first few zeros on the critical line

−12.32829358684807003931717383951, −11.33308219738814753739095151903, −10.42244772798844619334074556856, −8.006756090599704897162551739604, −6.31579964077282729691535524869, −5.95501847245031568571425602477, −4.57661723860691897384767003076, −3.75474658681915674625014110675, −2.29514670413861352688568348528, −1.19724159682022932055312109468, 1.19724159682022932055312109468, 2.29514670413861352688568348528, 3.75474658681915674625014110675, 4.57661723860691897384767003076, 5.95501847245031568571425602477, 6.31579964077282729691535524869, 8.006756090599704897162551739604, 10.42244772798844619334074556856, 11.33308219738814753739095151903, 12.32829358684807003931717383951

Graph of the $Z$-function along the critical line