Properties

Label 2-643-643.642-c0-0-1
Degree $2$
Conductor $643$
Sign $1$
Analytic cond. $0.320898$
Root an. cond. $0.566479$
Motivic weight $0$
Arithmetic yes
Rational yes
Primitive yes
Self-dual yes
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  + 4-s − 7-s + 9-s + 16-s − 23-s + 25-s − 28-s − 29-s − 31-s + 36-s − 53-s − 63-s + 64-s + 81-s − 83-s − 89-s − 92-s − 97-s + 100-s − 101-s − 112-s − 116-s + ⋯
L(s)  = 1  + 4-s − 7-s + 9-s + 16-s − 23-s + 25-s − 28-s − 29-s − 31-s + 36-s − 53-s − 63-s + 64-s + 81-s − 83-s − 89-s − 92-s − 97-s + 100-s − 101-s − 112-s − 116-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 643 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & \, \Lambda(1-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 643 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & \, \Lambda(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(643\)
Sign: $1$
Analytic conductor: \(0.320898\)
Root analytic conductor: \(0.566479\)
Motivic weight: \(0\)
Rational: yes
Arithmetic: yes
Character: $\chi_{643} (642, \cdot )$
Primitive: yes
Self-dual: yes
Analytic rank: \(0\)
Selberg data: \((2,\ 643,\ (\ :0),\ 1)\)

Particular Values

\(L(\frac{1}{2})\) \(\approx\) \(1.100064534\)
\(L(\frac12)\) \(\approx\) \(1.100064534\)
\(L(1)\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad643 \( 1 - T \)
good2 \( ( 1 - T )( 1 + T ) \)
3 \( ( 1 - T )( 1 + T ) \)
5 \( ( 1 - T )( 1 + T ) \)
7 \( 1 + T + T^{2} \)
11 \( ( 1 - T )( 1 + T ) \)
13 \( ( 1 - T )( 1 + T ) \)
17 \( ( 1 - T )( 1 + T ) \)
19 \( ( 1 - T )( 1 + T ) \)
23 \( 1 + T + T^{2} \)
29 \( 1 + T + T^{2} \)
31 \( 1 + T + T^{2} \)
37 \( ( 1 - T )( 1 + T ) \)
41 \( ( 1 - T )( 1 + T ) \)
43 \( ( 1 - T )( 1 + T ) \)
47 \( ( 1 - T )( 1 + T ) \)
53 \( 1 + T + T^{2} \)
59 \( ( 1 - T )( 1 + T ) \)
61 \( ( 1 - T )( 1 + T ) \)
67 \( ( 1 - T )( 1 + T ) \)
71 \( ( 1 - T )( 1 + T ) \)
73 \( ( 1 - T )( 1 + T ) \)
79 \( ( 1 - T )( 1 + T ) \)
83 \( 1 + T + T^{2} \)
89 \( 1 + T + T^{2} \)
97 \( 1 + T + T^{2} \)
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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

−10.71263538745193220421839502131, −9.992562171607717376658605155789, −9.256767226866823683164663452628, −7.949098978020109802468250783181, −7.09811732045868397920703922587, −6.48973698624041496127341694059, −5.51593260392634103602563015577, −4.05592133023485231684242479158, −3.04761064021838015210864751315, −1.73887166628522477691175598862, 1.73887166628522477691175598862, 3.04761064021838015210864751315, 4.05592133023485231684242479158, 5.51593260392634103602563015577, 6.48973698624041496127341694059, 7.09811732045868397920703922587, 7.949098978020109802468250783181, 9.256767226866823683164663452628, 9.992562171607717376658605155789, 10.71263538745193220421839502131

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