Properties

Label 2-991-991.990-c0-0-7
Degree $2$
Conductor $991$
Sign $1$
Analytic cond. $0.494573$
Root an. cond. $0.703259$
Motivic weight $0$
Arithmetic yes
Rational no
Primitive yes
Self-dual yes
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  + 1.86·2-s + 2.47·4-s − 1.20·5-s + 2.75·8-s + 9-s − 2.24·10-s − 1.96·13-s + 2.66·16-s + 1.86·18-s + 0.184·19-s − 2.98·20-s + 0.452·25-s − 3.66·26-s − 1.70·29-s + 0.891·31-s + 2.20·32-s + 2.47·36-s + 0.344·38-s − 3.32·40-s − 1.70·43-s − 1.20·45-s + 49-s + 0.844·50-s − 4.87·52-s + 0.184·53-s − 3.17·58-s − 0.547·59-s + ⋯
L(s)  = 1  + 1.86·2-s + 2.47·4-s − 1.20·5-s + 2.75·8-s + 9-s − 2.24·10-s − 1.96·13-s + 2.66·16-s + 1.86·18-s + 0.184·19-s − 2.98·20-s + 0.452·25-s − 3.66·26-s − 1.70·29-s + 0.891·31-s + 2.20·32-s + 2.47·36-s + 0.344·38-s − 3.32·40-s − 1.70·43-s − 1.20·45-s + 49-s + 0.844·50-s − 4.87·52-s + 0.184·53-s − 3.17·58-s − 0.547·59-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 991 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & \, \Lambda(1-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 991 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & \, \Lambda(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(991\)
Sign: $1$
Analytic conductor: \(0.494573\)
Root analytic conductor: \(0.703259\)
Motivic weight: \(0\)
Rational: no
Arithmetic: yes
Character: $\chi_{991} (990, \cdot )$
Primitive: yes
Self-dual: yes
Analytic rank: \(0\)
Selberg data: \((2,\ 991,\ (\ :0),\ 1)\)

Particular Values

\(L(\frac{1}{2})\) \(\approx\) \(2.483849842\)
\(L(\frac12)\) \(\approx\) \(2.483849842\)
\(L(1)\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad991 \( 1 - T \)
good2 \( 1 - 1.86T + T^{2} \)
3 \( 1 - T^{2} \)
5 \( 1 + 1.20T + T^{2} \)
7 \( 1 - T^{2} \)
11 \( 1 - T^{2} \)
13 \( 1 + 1.96T + T^{2} \)
17 \( 1 - T^{2} \)
19 \( 1 - 0.184T + T^{2} \)
23 \( 1 - T^{2} \)
29 \( 1 + 1.70T + T^{2} \)
31 \( 1 - 0.891T + T^{2} \)
37 \( 1 - T^{2} \)
41 \( 1 - T^{2} \)
43 \( 1 + 1.70T + T^{2} \)
47 \( 1 - T^{2} \)
53 \( 1 - 0.184T + T^{2} \)
59 \( 1 + 0.547T + T^{2} \)
61 \( 1 - 0.891T + T^{2} \)
67 \( 1 - 1.47T + T^{2} \)
71 \( 1 + 0.547T + T^{2} \)
73 \( 1 - T^{2} \)
79 \( 1 + 1.96T + T^{2} \)
83 \( 1 - T^{2} \)
89 \( 1 - T^{2} \)
97 \( 1 - T^{2} \)
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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

−10.45111628031485698689291226679, −9.652073182917745651619294999001, −8.022081760393109585123323219122, −7.24884270831555010061658610619, −6.91735689248000708967123815984, −5.55154757257054022127917544680, −4.71701612919134976367296256185, −4.13742087577338309043200699593, −3.24064205067310629735920670471, −2.08066746062596779984378033602, 2.08066746062596779984378033602, 3.24064205067310629735920670471, 4.13742087577338309043200699593, 4.71701612919134976367296256185, 5.55154757257054022127917544680, 6.91735689248000708967123815984, 7.24884270831555010061658610619, 8.022081760393109585123323219122, 9.652073182917745651619294999001, 10.45111628031485698689291226679

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