Properties

Label 2-640-80.29-c1-0-5
Degree $2$
Conductor $640$
Sign $0.0708 - 0.997i$
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  + (1 − i)3-s + (−1 + 2i)5-s + i·9-s + (−3 + 3i)11-s + (−3 + 3i)13-s + (1 + 3i)15-s + 4i·17-s + (−1 − i)19-s + 8·23-s + (−3 − 4i)25-s + (4 + 4i)27-s + (−3 − 3i)29-s + 6i·33-s + (−3 − 3i)37-s + 6i·39-s + ⋯
L(s)  = 1  + (0.577 − 0.577i)3-s + (−0.447 + 0.894i)5-s + 0.333i·9-s + (−0.904 + 0.904i)11-s + (−0.832 + 0.832i)13-s + (0.258 + 0.774i)15-s + 0.970i·17-s + (−0.229 − 0.229i)19-s + 1.66·23-s + (−0.600 − 0.800i)25-s + (0.769 + 0.769i)27-s + (−0.557 − 0.557i)29-s + 1.04i·33-s + (−0.493 − 0.493i)37-s + 0.960i·39-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 640 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & (0.0708 - 0.997i)\, \overline{\Lambda}(2-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 640 ^{s/2} \, \Gamma_{\C}(s+1/2) \, L(s)\cr =\mathstrut & (0.0708 - 0.997i)\, \overline{\Lambda}(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(640\)    =    \(2^{7} \cdot 5\)
Sign: $0.0708 - 0.997i$
Analytic conductor: \(5.11042\)
Root analytic conductor: \(2.26062\)
Motivic weight: \(1\)
Rational: no
Arithmetic: yes
Character: $\chi_{640} (289, \cdot )$
Primitive: yes
Self-dual: no
Analytic rank: \(0\)
Selberg data: \((2,\ 640,\ (\ :1/2),\ 0.0708 - 0.997i)\)

Particular Values

\(L(1)\) \(\approx\) \(0.920166 + 0.857093i\)
\(L(\frac12)\) \(\approx\) \(0.920166 + 0.857093i\)
\(L(\frac{3}{2})\) 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 \( 1 + (1 - 2i)T \)
good3 \( 1 + (-1 + i)T - 3iT^{2} \)
7 \( 1 + 7T^{2} \)
11 \( 1 + (3 - 3i)T - 11iT^{2} \)
13 \( 1 + (3 - 3i)T - 13iT^{2} \)
17 \( 1 - 4iT - 17T^{2} \)
19 \( 1 + (1 + i)T + 19iT^{2} \)
23 \( 1 - 8T + 23T^{2} \)
29 \( 1 + (3 + 3i)T + 29iT^{2} \)
31 \( 1 + 31T^{2} \)
37 \( 1 + (3 + 3i)T + 37iT^{2} \)
41 \( 1 - 41T^{2} \)
43 \( 1 + (-3 - 3i)T + 43iT^{2} \)
47 \( 1 + 2iT - 47T^{2} \)
53 \( 1 + (-9 - 9i)T + 53iT^{2} \)
59 \( 1 + (-9 + 9i)T - 59iT^{2} \)
61 \( 1 + (-5 - 5i)T + 61iT^{2} \)
67 \( 1 + (3 - 3i)T - 67iT^{2} \)
71 \( 1 - 6iT - 71T^{2} \)
73 \( 1 - 6T + 73T^{2} \)
79 \( 1 + 8T + 79T^{2} \)
83 \( 1 + (-9 + 9i)T - 83iT^{2} \)
89 \( 1 - 12iT - 89T^{2} \)
97 \( 1 + 12iT - 97T^{2} \)
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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

−10.74882932097001688569872328489, −10.02422947359015508493052249545, −8.931900027358690525427905030296, −7.934188730423437248325410580756, −7.28853589815066075941469339499, −6.72687674706282178522360407733, −5.24512710445198219723813836794, −4.16645413286408649562553726047, −2.78832385338468890164191577751, −2.03699737882536283037917391263, 0.62029260297903430405597842059, 2.78011231566836806873499945014, 3.60532436475525668714739903053, 4.90268197831600952299765836974, 5.43700459579989669504937424426, 6.99797587148800500169818590833, 7.967965778865657239327681287075, 8.696290961091251964030592508103, 9.364282824778839666626575241565, 10.24428104584806873137314125239

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