Properties

Label 2-20691-1.1-c1-0-0
Degree $2$
Conductor $20691$
Sign $1$
Analytic cond. $165.218$
Root an. cond. $12.8537$
Motivic weight $1$
Arithmetic yes
Rational yes
Primitive yes
Self-dual yes
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  − 2·2-s + 2·4-s − 5-s − 3·7-s + 2·10-s + 6·13-s + 6·14-s − 4·16-s + 3·17-s + 19-s − 2·20-s − 4·23-s − 4·25-s − 12·26-s − 6·28-s − 10·29-s + 2·31-s + 8·32-s − 6·34-s + 3·35-s + 8·37-s − 2·38-s − 8·41-s + 43-s + 8·46-s − 3·47-s + 2·49-s + ⋯
L(s)  = 1  − 1.41·2-s + 4-s − 0.447·5-s − 1.13·7-s + 0.632·10-s + 1.66·13-s + 1.60·14-s − 16-s + 0.727·17-s + 0.229·19-s − 0.447·20-s − 0.834·23-s − 4/5·25-s − 2.35·26-s − 1.13·28-s − 1.85·29-s + 0.359·31-s + 1.41·32-s − 1.02·34-s + 0.507·35-s + 1.31·37-s − 0.324·38-s − 1.24·41-s + 0.152·43-s + 1.17·46-s − 0.437·47-s + 2/7·49-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 20691 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & \, \Lambda(2-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 20691 ^{s/2} \, \Gamma_{\C}(s+1/2) \, L(s)\cr =\mathstrut & \, \Lambda(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(20691\)    =    \(3^{2} \cdot 11^{2} \cdot 19\)
Sign: $1$
Analytic conductor: \(165.218\)
Root analytic conductor: \(12.8537\)
Motivic weight: \(1\)
Rational: yes
Arithmetic: yes
Character: Trivial
Primitive: yes
Self-dual: yes
Analytic rank: \(0\)
Selberg data: \((2,\ 20691,\ (\ :1/2),\ 1)\)

Particular Values

\(L(1)\) \(\approx\) \(0.5104910745\)
\(L(\frac12)\) \(\approx\) \(0.5104910745\)
\(L(\frac{3}{2})\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad3 \( 1 \)
11 \( 1 \)
19 \( 1 - T \)
good2 \( 1 + p T + p T^{2} \)
5 \( 1 + T + p T^{2} \)
7 \( 1 + 3 T + p T^{2} \)
13 \( 1 - 6 T + p T^{2} \)
17 \( 1 - 3 T + p T^{2} \)
23 \( 1 + 4 T + p T^{2} \)
29 \( 1 + 10 T + p T^{2} \)
31 \( 1 - 2 T + p T^{2} \)
37 \( 1 - 8 T + p T^{2} \)
41 \( 1 + 8 T + p T^{2} \)
43 \( 1 - T + p T^{2} \)
47 \( 1 + 3 T + p T^{2} \)
53 \( 1 - 6 T + p T^{2} \)
59 \( 1 + p T^{2} \)
61 \( 1 + 7 T + p T^{2} \)
67 \( 1 - 8 T + p T^{2} \)
71 \( 1 + 12 T + p T^{2} \)
73 \( 1 - 11 T + p T^{2} \)
79 \( 1 + p T^{2} \)
83 \( 1 - 4 T + p T^{2} \)
89 \( 1 + 10 T + p T^{2} \)
97 \( 1 + 2 T + p T^{2} \)
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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

−15.75498740859363, −15.46098417190397, −14.70768979511995, −13.80383729129521, −13.43534822766410, −12.95416072827254, −12.19051481256727, −11.45549372514651, −11.23798175959389, −10.39561622728319, −10.01758332968994, −9.396885538583134, −9.073475582496539, −8.189502554416206, −7.988731184558783, −7.297078986296944, −6.607528270516365, −6.052250699158225, −5.480741427285755, −4.264436383379720, −3.717964749602516, −3.147213188159605, −2.057550628367009, −1.292698686384929, −0.4006813149579238, 0.4006813149579238, 1.292698686384929, 2.057550628367009, 3.147213188159605, 3.717964749602516, 4.264436383379720, 5.480741427285755, 6.052250699158225, 6.607528270516365, 7.297078986296944, 7.988731184558783, 8.189502554416206, 9.073475582496539, 9.396885538583134, 10.01758332968994, 10.39561622728319, 11.23798175959389, 11.45549372514651, 12.19051481256727, 12.95416072827254, 13.43534822766410, 13.80383729129521, 14.70768979511995, 15.46098417190397, 15.75498740859363

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