Properties

Label 2-688-43.42-c2-0-42
Degree $2$
Conductor $688$
Sign $-0.518 - 0.855i$
Analytic cond. $18.7466$
Root an. cond. $4.32973$
Motivic weight $2$
Arithmetic yes
Rational no
Primitive yes
Self-dual no
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  − 3.59i·3-s − 7.02i·5-s − 0.845i·7-s − 3.91·9-s − 14.5·11-s − 15.5·13-s − 25.2·15-s + 6.95·17-s + 30.8i·19-s − 3.03·21-s − 17.5·23-s − 24.3·25-s − 18.2i·27-s − 7.86i·29-s + 57.7·31-s + ⋯
L(s)  = 1  − 1.19i·3-s − 1.40i·5-s − 0.120i·7-s − 0.435·9-s − 1.32·11-s − 1.19·13-s − 1.68·15-s + 0.409·17-s + 1.62i·19-s − 0.144·21-s − 0.761·23-s − 0.972·25-s − 0.676i·27-s − 0.271i·29-s + 1.86·31-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 688 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & (-0.518 - 0.855i)\, \overline{\Lambda}(3-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 688 ^{s/2} \, \Gamma_{\C}(s+1) \, L(s)\cr =\mathstrut & (-0.518 - 0.855i)\, \overline{\Lambda}(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(688\)    =    \(2^{4} \cdot 43\)
Sign: $-0.518 - 0.855i$
Analytic conductor: \(18.7466\)
Root analytic conductor: \(4.32973\)
Motivic weight: \(2\)
Rational: no
Arithmetic: yes
Character: $\chi_{688} (257, \cdot )$
Primitive: yes
Self-dual: no
Analytic rank: \(0\)
Selberg data: \((2,\ 688,\ (\ :1),\ -0.518 - 0.855i)\)

Particular Values

\(L(\frac{3}{2})\) \(\approx\) \(0.6368900458\)
\(L(\frac12)\) \(\approx\) \(0.6368900458\)
\(L(2)\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad2 \( 1 \)
43 \( 1 + (22.2 + 36.7i)T \)
good3 \( 1 + 3.59iT - 9T^{2} \)
5 \( 1 + 7.02iT - 25T^{2} \)
7 \( 1 + 0.845iT - 49T^{2} \)
11 \( 1 + 14.5T + 121T^{2} \)
13 \( 1 + 15.5T + 169T^{2} \)
17 \( 1 - 6.95T + 289T^{2} \)
19 \( 1 - 30.8iT - 361T^{2} \)
23 \( 1 + 17.5T + 529T^{2} \)
29 \( 1 + 7.86iT - 841T^{2} \)
31 \( 1 - 57.7T + 961T^{2} \)
37 \( 1 + 32.5iT - 1.36e3T^{2} \)
41 \( 1 + 18.4T + 1.68e3T^{2} \)
47 \( 1 - 25.7T + 2.20e3T^{2} \)
53 \( 1 + 79.9T + 2.80e3T^{2} \)
59 \( 1 + 18.4T + 3.48e3T^{2} \)
61 \( 1 - 76.1iT - 3.72e3T^{2} \)
67 \( 1 + 9.00T + 4.48e3T^{2} \)
71 \( 1 + 51.6iT - 5.04e3T^{2} \)
73 \( 1 - 77.4iT - 5.32e3T^{2} \)
79 \( 1 + 7.04T + 6.24e3T^{2} \)
83 \( 1 + 83.8T + 6.88e3T^{2} \)
89 \( 1 + 91.8iT - 7.92e3T^{2} \)
97 \( 1 + 155.T + 9.40e3T^{2} \)
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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

−9.807330685420039937497885963625, −8.479792241107911920133474029401, −7.932456600457618855567066361849, −7.33452123060819468197716279384, −6.02120697402676172615250221029, −5.24243311854378481084110983566, −4.24919108002996658355951848515, −2.52145593732797323357151255778, −1.44145718990025503762320195007, −0.22145742284189302759044630366, 2.59143522347690738423842833428, 3.10140772756418676482117799098, 4.53283236873946172771914214501, 5.17499555225673900639297339639, 6.46604109743880412339005483498, 7.32402911358353690946608515953, 8.209505981434878451808685549961, 9.547030712022799192136158022512, 10.05089005925476301592099771172, 10.64030179910674866973067223562

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