Properties

Label 2-640-40.29-c1-0-0
Degree $2$
Conductor $640$
Sign $-1$
Analytic cond. $5.11042$
Root an. cond. $2.26062$
Motivic weight $1$
Arithmetic yes
Rational no
Primitive yes
Self-dual no
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  − 3.16·3-s + 2.23i·5-s + 4.24i·7-s + 7.00·9-s − 7.07i·15-s − 13.4i·21-s + 1.41i·23-s − 5.00·25-s − 12.6·27-s + 8.94i·29-s − 9.48·35-s − 12·41-s − 3.16·43-s + 15.6i·45-s − 9.89i·47-s + ⋯
L(s)  = 1  − 1.82·3-s + 0.999i·5-s + 1.60i·7-s + 2.33·9-s − 1.82i·15-s − 2.92i·21-s + 0.294i·23-s − 1.00·25-s − 2.43·27-s + 1.66i·29-s − 1.60·35-s − 1.87·41-s − 0.482·43-s + 2.33i·45-s − 1.44i·47-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 640 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & -\, \overline{\Lambda}(2-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 640 ^{s/2} \, \Gamma_{\C}(s+1/2) \, L(s)\cr =\mathstrut & -\, \overline{\Lambda}(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(640\)    =    \(2^{7} \cdot 5\)
Sign: $-1$
Analytic conductor: \(5.11042\)
Root analytic conductor: \(2.26062\)
Motivic weight: \(1\)
Rational: no
Arithmetic: yes
Character: $\chi_{640} (449, \cdot )$
Primitive: yes
Self-dual: no
Analytic rank: \(0\)
Selberg data: \((2,\ 640,\ (\ :1/2),\ -1)\)

Particular Values

\(L(1)\) \(\approx\) \(-0.442641i\)
\(L(\frac12)\) \(\approx\) \(-0.442641i\)
\(L(\frac{3}{2})\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad2 \( 1 \)
5 \( 1 - 2.23iT \)
good3 \( 1 + 3.16T + 3T^{2} \)
7 \( 1 - 4.24iT - 7T^{2} \)
11 \( 1 - 11T^{2} \)
13 \( 1 + 13T^{2} \)
17 \( 1 - 17T^{2} \)
19 \( 1 - 19T^{2} \)
23 \( 1 - 1.41iT - 23T^{2} \)
29 \( 1 - 8.94iT - 29T^{2} \)
31 \( 1 + 31T^{2} \)
37 \( 1 + 37T^{2} \)
41 \( 1 + 12T + 41T^{2} \)
43 \( 1 + 3.16T + 43T^{2} \)
47 \( 1 + 9.89iT - 47T^{2} \)
53 \( 1 + 53T^{2} \)
59 \( 1 - 59T^{2} \)
61 \( 1 + 13.4iT - 61T^{2} \)
67 \( 1 - 15.8T + 67T^{2} \)
71 \( 1 + 71T^{2} \)
73 \( 1 - 73T^{2} \)
79 \( 1 + 79T^{2} \)
83 \( 1 + 9.48T + 83T^{2} \)
89 \( 1 + 6T + 89T^{2} \)
97 \( 1 - 97T^{2} \)
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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

−11.15300320442692612992440345658, −10.35837642340382558450938013590, −9.578360623351604598425923251396, −8.379369682509881183453623199089, −7.00311258424117998155116840347, −6.49132396223790901103847816349, −5.54470320117646251012923532883, −5.05152438700207788296463899958, −3.43068112290929020497867994407, −1.91303189722742708556565540334, 0.32930517265278970851810051168, 1.34868851682861573660075126866, 4.02881501329376439029045034743, 4.59935673512323901029284567037, 5.52033782735803299521553417665, 6.46460209123470672769002340634, 7.26716864061761554467849436925, 8.219074314540231395010763315854, 9.728509926877035802461870515902, 10.20346304680597843853554148870

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