Properties

Label 2-991-991.990-c0-0-6
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  + 0.891·2-s − 0.205·4-s + 1.86·5-s − 1.07·8-s + 9-s + 1.66·10-s − 1.70·13-s − 0.752·16-s + 0.891·18-s − 0.547·19-s − 0.382·20-s + 2.47·25-s − 1.51·26-s + 0.184·29-s − 1.96·31-s + 0.403·32-s − 0.205·36-s − 0.487·38-s − 2.00·40-s + 0.184·43-s + 1.86·45-s + 49-s + 2.20·50-s + 0.349·52-s − 0.547·53-s + 0.164·58-s + 1.47·59-s + ⋯
L(s)  = 1  + 0.891·2-s − 0.205·4-s + 1.86·5-s − 1.07·8-s + 9-s + 1.66·10-s − 1.70·13-s − 0.752·16-s + 0.891·18-s − 0.547·19-s − 0.382·20-s + 2.47·25-s − 1.51·26-s + 0.184·29-s − 1.96·31-s + 0.403·32-s − 0.205·36-s − 0.487·38-s − 2.00·40-s + 0.184·43-s + 1.86·45-s + 49-s + 2.20·50-s + 0.349·52-s − 0.547·53-s + 0.164·58-s + 1.47·59-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

\(L(\frac{1}{2})\) \(\approx\) \(1.750410265\)
\(L(\frac12)\) \(\approx\) \(1.750410265\)
\(L(1)\) 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 \( 1 - 0.891T + T^{2} \)
3 \( 1 - T^{2} \)
5 \( 1 - 1.86T + T^{2} \)
7 \( 1 - T^{2} \)
11 \( 1 - T^{2} \)
13 \( 1 + 1.70T + T^{2} \)
17 \( 1 - T^{2} \)
19 \( 1 + 0.547T + T^{2} \)
23 \( 1 - T^{2} \)
29 \( 1 - 0.184T + T^{2} \)
31 \( 1 + 1.96T + T^{2} \)
37 \( 1 - T^{2} \)
41 \( 1 - T^{2} \)
43 \( 1 - 0.184T + T^{2} \)
47 \( 1 - T^{2} \)
53 \( 1 + 0.547T + T^{2} \)
59 \( 1 - 1.47T + T^{2} \)
61 \( 1 + 1.96T + T^{2} \)
67 \( 1 + 1.20T + T^{2} \)
71 \( 1 - 1.47T + T^{2} \)
73 \( 1 - T^{2} \)
79 \( 1 + 1.70T + T^{2} \)
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

−9.996198953429350448626985854643, −9.520841069064073408658815152671, −8.866970107672524887904102008777, −7.37146280979417854443805044933, −6.57948566380600471636066284105, −5.64136966607014546243137790169, −5.06187702469306368279194211171, −4.20235094839647178606395042221, −2.77786894867274202422693280568, −1.85029238154871274051666353517, 1.85029238154871274051666353517, 2.77786894867274202422693280568, 4.20235094839647178606395042221, 5.06187702469306368279194211171, 5.64136966607014546243137790169, 6.57948566380600471636066284105, 7.37146280979417854443805044933, 8.866970107672524887904102008777, 9.520841069064073408658815152671, 9.996198953429350448626985854643

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