Properties

Label 2-640-5.4-c1-0-20
Degree $2$
Conductor $640$
Sign $-0.749 + 0.662i$
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  − 0.806i·3-s + (−1.48 − 1.67i)5-s − 2.15i·7-s + 2.35·9-s − 0.387·11-s − 0.962i·13-s + (−1.35 + 1.19i)15-s + 1.61i·17-s − 6.31·19-s − 1.73·21-s − 6.15i·23-s + (−0.612 + 4.96i)25-s − 4.31i·27-s − 2·29-s − 9.92·31-s + ⋯
L(s)  = 1  − 0.465i·3-s + (−0.662 − 0.749i)5-s − 0.815i·7-s + 0.783·9-s − 0.116·11-s − 0.266i·13-s + (−0.348 + 0.308i)15-s + 0.390i·17-s − 1.44·19-s − 0.379·21-s − 1.28i·23-s + (−0.122 + 0.992i)25-s − 0.829i·27-s − 0.371·29-s − 1.78·31-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 640 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & (-0.749 + 0.662i)\, \overline{\Lambda}(2-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 640 ^{s/2} \, \Gamma_{\C}(s+1/2) \, L(s)\cr =\mathstrut & (-0.749 + 0.662i)\, \overline{\Lambda}(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(640\)    =    \(2^{7} \cdot 5\)
Sign: $-0.749 + 0.662i$
Analytic conductor: \(5.11042\)
Root analytic conductor: \(2.26062\)
Motivic weight: \(1\)
Rational: no
Arithmetic: yes
Character: $\chi_{640} (129, \cdot )$
Primitive: yes
Self-dual: no
Analytic rank: \(0\)
Selberg data: \((2,\ 640,\ (\ :1/2),\ -0.749 + 0.662i)\)

Particular Values

\(L(1)\) \(\approx\) \(0.363850 - 0.960774i\)
\(L(\frac12)\) \(\approx\) \(0.363850 - 0.960774i\)
\(L(\frac{3}{2})\) 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 \( 1 + (1.48 + 1.67i)T \)
good3 \( 1 + 0.806iT - 3T^{2} \)
7 \( 1 + 2.15iT - 7T^{2} \)
11 \( 1 + 0.387T + 11T^{2} \)
13 \( 1 + 0.962iT - 13T^{2} \)
17 \( 1 - 1.61iT - 17T^{2} \)
19 \( 1 + 6.31T + 19T^{2} \)
23 \( 1 + 6.15iT - 23T^{2} \)
29 \( 1 + 2T + 29T^{2} \)
31 \( 1 + 9.92T + 31T^{2} \)
37 \( 1 + 6.57iT - 37T^{2} \)
41 \( 1 - 4.57T + 41T^{2} \)
43 \( 1 + 11.5iT - 43T^{2} \)
47 \( 1 - 4.54iT - 47T^{2} \)
53 \( 1 - 8.96iT - 53T^{2} \)
59 \( 1 - 6.31T + 59T^{2} \)
61 \( 1 - 0.261T + 61T^{2} \)
67 \( 1 - 9.89iT - 67T^{2} \)
71 \( 1 - 10.7T + 71T^{2} \)
73 \( 1 + 13.0iT - 73T^{2} \)
79 \( 1 + 1.92T + 79T^{2} \)
83 \( 1 + 2.88iT - 83T^{2} \)
89 \( 1 + 10.6T + 89T^{2} \)
97 \( 1 - 9.61iT - 97T^{2} \)
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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

−10.51139105263399323137518548825, −9.226814885442788513723859142927, −8.412237946063218968572319087020, −7.52873425432985526332272893076, −6.93086086737504767099316288499, −5.70419531325168523817703881243, −4.38848025002003117857841614802, −3.88574069560824373859677896090, −2.00208103726861294802927635517, −0.55351058273099113143159957357, 2.06863485004794163643278776875, 3.39630476533070444440078717580, 4.28060099177906639086947583016, 5.39111725514372905128772070435, 6.54531321789428489611513867533, 7.34986814219781701425467321554, 8.296054167908762028417116058440, 9.297522674512721725512641865025, 10.01415236132315578584481054733, 11.02292800078921307153179024592

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