Properties

Label 2-2e8-8.5-c3-0-16
Degree $2$
Conductor $256$
Sign $-0.707 + 0.707i$
Analytic cond. $15.1044$
Root an. cond. $3.88644$
Motivic weight $3$
Arithmetic yes
Rational no
Primitive yes
Self-dual no
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  − 2i·3-s + 6i·5-s − 20·7-s + 23·9-s + 14i·11-s − 54i·13-s + 12·15-s − 66·17-s − 162i·19-s + 40i·21-s − 172·23-s + 89·25-s − 100i·27-s + 2i·29-s − 128·31-s + ⋯
L(s)  = 1  − 0.384i·3-s + 0.536i·5-s − 1.07·7-s + 0.851·9-s + 0.383i·11-s − 1.15i·13-s + 0.206·15-s − 0.941·17-s − 1.95i·19-s + 0.415i·21-s − 1.55·23-s + 0.711·25-s − 0.712i·27-s + 0.0128i·29-s − 0.741·31-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 256 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & (-0.707 + 0.707i)\, \overline{\Lambda}(4-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 256 ^{s/2} \, \Gamma_{\C}(s+3/2) \, L(s)\cr =\mathstrut & (-0.707 + 0.707i)\, \overline{\Lambda}(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(256\)    =    \(2^{8}\)
Sign: $-0.707 + 0.707i$
Analytic conductor: \(15.1044\)
Root analytic conductor: \(3.88644\)
Motivic weight: \(3\)
Rational: no
Arithmetic: yes
Character: $\chi_{256} (129, \cdot )$
Primitive: yes
Self-dual: no
Analytic rank: \(0\)
Selberg data: \((2,\ 256,\ (\ :3/2),\ -0.707 + 0.707i)\)

Particular Values

\(L(2)\) \(\approx\) \(0.7737000573\)
\(L(\frac12)\) \(\approx\) \(0.7737000573\)
\(L(\frac{5}{2})\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad2 \( 1 \)
good3 \( 1 + 2iT - 27T^{2} \)
5 \( 1 - 6iT - 125T^{2} \)
7 \( 1 + 20T + 343T^{2} \)
11 \( 1 - 14iT - 1.33e3T^{2} \)
13 \( 1 + 54iT - 2.19e3T^{2} \)
17 \( 1 + 66T + 4.91e3T^{2} \)
19 \( 1 + 162iT - 6.85e3T^{2} \)
23 \( 1 + 172T + 1.21e4T^{2} \)
29 \( 1 - 2iT - 2.43e4T^{2} \)
31 \( 1 + 128T + 2.97e4T^{2} \)
37 \( 1 - 158iT - 5.06e4T^{2} \)
41 \( 1 + 202T + 6.89e4T^{2} \)
43 \( 1 + 298iT - 7.95e4T^{2} \)
47 \( 1 + 408T + 1.03e5T^{2} \)
53 \( 1 + 690iT - 1.48e5T^{2} \)
59 \( 1 + 322iT - 2.05e5T^{2} \)
61 \( 1 - 298iT - 2.26e5T^{2} \)
67 \( 1 + 202iT - 3.00e5T^{2} \)
71 \( 1 - 700T + 3.57e5T^{2} \)
73 \( 1 - 418T + 3.89e5T^{2} \)
79 \( 1 - 744T + 4.93e5T^{2} \)
83 \( 1 - 678iT - 5.71e5T^{2} \)
89 \( 1 - 82T + 7.04e5T^{2} \)
97 \( 1 + 1.12e3T + 9.12e5T^{2} \)
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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

−11.13766477335058199241036197796, −10.20933697575901816904992928190, −9.478500063167690374169938011415, −8.180534893498519379782528293148, −6.92050518766229709018673813712, −6.57501172101635111372119675474, −4.98543775143759948283876500824, −3.53848057744511487794138093367, −2.29322460015844818711690119812, −0.29291374160898331249122885786, 1.72540361878266596083152973375, 3.62195825889249314631442671288, 4.45486216720036983971795561980, 5.94126336802432237634777685809, 6.82852509645970742603065821296, 8.143870539090073500484143449758, 9.275373929671376793805333079964, 9.854070737280347293667452203539, 10.84838661678314578719945356647, 12.12532635346900776171116018931

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