Properties

Label 2-640-40.29-c1-0-14
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

\(L(1)\) \(\approx\) \(2.72768\)
\(L(\frac12)\) \(\approx\) \(2.72768\)
\(L(\frac{3}{2})\) 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

−10.08164302268214710263413629760, −9.408807609495483701642905618522, −8.700271725833440307662848352971, −8.362799426899788378782365167232, −7.42136494465135891279067382449, −5.99284757057185555489680069110, −4.90768817164404374206429114034, −3.80213579155021671167182054169, −2.64000767398197898063795291477, −1.79017758012972534947909954255, 1.64761737012159444220585707173, 3.03181394402838333716211617106, 3.61368859016422403780433774379, 4.59348051411225990931472056424, 6.58619465988684527394949424807, 7.26488381721599218193184842289, 7.82243395380856467937608846883, 8.784042916977487234572735819441, 9.767309156051866700771405142530, 10.38444675993146745884492222213

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