Properties

Label 2-2e8-4.3-c6-0-4
Degree $2$
Conductor $256$
Sign $i$
Analytic cond. $58.8938$
Root an. cond. $7.67423$
Motivic weight $6$
Arithmetic yes
Rational no
Primitive yes
Self-dual no
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  + 46i·3-s − 1.38e3·9-s + 2.33e3i·11-s − 1.72e3·17-s − 2.48e3i·19-s − 1.56e4·25-s − 3.02e4i·27-s − 1.07e5·33-s − 1.34e5·41-s + 7.49e4i·43-s + 1.17e5·49-s − 7.93e4i·51-s + 1.14e5·57-s − 3.04e5i·59-s − 5.96e5i·67-s + ⋯
L(s)  = 1  + 1.70i·3-s − 1.90·9-s + 1.75i·11-s − 0.351·17-s − 0.361i·19-s − 25-s − 1.53i·27-s − 2.99·33-s − 1.95·41-s + 0.942i·43-s + 49-s − 0.598i·51-s + 0.616·57-s − 1.48i·59-s − 1.98i·67-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 256 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & i\, \overline{\Lambda}(7-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 256 ^{s/2} \, \Gamma_{\C}(s+3) \, L(s)\cr =\mathstrut & i\, \overline{\Lambda}(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(256\)    =    \(2^{8}\)
Sign: $i$
Analytic conductor: \(58.8938\)
Root analytic conductor: \(7.67423\)
Motivic weight: \(6\)
Rational: no
Arithmetic: yes
Character: $\chi_{256} (255, \cdot )$
Primitive: yes
Self-dual: no
Analytic rank: \(0\)
Selberg data: \((2,\ 256,\ (\ :3),\ i)\)

Particular Values

\(L(\frac{7}{2})\) \(\approx\) \(0.4851977642\)
\(L(\frac12)\) \(\approx\) \(0.4851977642\)
\(L(4)\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad2 \( 1 \)
good3 \( 1 - 46iT - 729T^{2} \)
5 \( 1 + 1.56e4T^{2} \)
7 \( 1 - 1.17e5T^{2} \)
11 \( 1 - 2.33e3iT - 1.77e6T^{2} \)
13 \( 1 + 4.82e6T^{2} \)
17 \( 1 + 1.72e3T + 2.41e7T^{2} \)
19 \( 1 + 2.48e3iT - 4.70e7T^{2} \)
23 \( 1 - 1.48e8T^{2} \)
29 \( 1 + 5.94e8T^{2} \)
31 \( 1 - 8.87e8T^{2} \)
37 \( 1 + 2.56e9T^{2} \)
41 \( 1 + 1.34e5T + 4.75e9T^{2} \)
43 \( 1 - 7.49e4iT - 6.32e9T^{2} \)
47 \( 1 - 1.07e10T^{2} \)
53 \( 1 + 2.21e10T^{2} \)
59 \( 1 + 3.04e5iT - 4.21e10T^{2} \)
61 \( 1 + 5.15e10T^{2} \)
67 \( 1 + 5.96e5iT - 9.04e10T^{2} \)
71 \( 1 - 1.28e11T^{2} \)
73 \( 1 - 5.93e5T + 1.51e11T^{2} \)
79 \( 1 - 2.43e11T^{2} \)
83 \( 1 - 6.78e5iT - 3.26e11T^{2} \)
89 \( 1 - 3.57e5T + 4.96e11T^{2} \)
97 \( 1 - 1.82e6T + 8.32e11T^{2} \)
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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

−11.46032832461422437498470920580, −10.49673472560877076287147646902, −9.772046672517087171576322596535, −9.195687696054833093342330133809, −7.954938260543692240732324046305, −6.63452839026957941631420292790, −5.18793932610575599342777760826, −4.52430227267389778495550521223, −3.54476157437883760203065766044, −2.10851925154106419350314046332, 0.12738945172726314096066887433, 1.13690728468161877757145629769, 2.32745868636680488367607960742, 3.55922123814746324165451279920, 5.54493039481602849544264642851, 6.27255232848034694235782283807, 7.24803858976984469675096417288, 8.216778418187485596194885798916, 8.838164377566353037457862448000, 10.45060087747704012913459331370

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