Properties

Label 2-2e8-8.3-c8-0-4
Degree $2$
Conductor $256$
Sign $-0.707 - 0.707i$
Analytic cond. $104.288$
Root an. cond. $10.2121$
Motivic weight $8$
Arithmetic yes
Rational no
Primitive yes
Self-dual no
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  + 63.9·3-s − 217. i·5-s + 1.72e3i·7-s − 2.47e3·9-s − 5.95e3·11-s − 4.91e4i·13-s − 1.39e4i·15-s − 5.56e4·17-s + 2.02e5·19-s + 1.10e5i·21-s + 2.09e5i·23-s + 3.43e5·25-s − 5.77e5·27-s + 3.08e3i·29-s + 1.36e6i·31-s + ⋯
L(s)  = 1  + 0.789·3-s − 0.348i·5-s + 0.718i·7-s − 0.377·9-s − 0.406·11-s − 1.71i·13-s − 0.274i·15-s − 0.666·17-s + 1.55·19-s + 0.567i·21-s + 0.748i·23-s + 0.878·25-s − 1.08·27-s + 0.00435i·29-s + 1.47i·31-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 256 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & (-0.707 - 0.707i)\, \overline{\Lambda}(9-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 256 ^{s/2} \, \Gamma_{\C}(s+4) \, L(s)\cr =\mathstrut & (-0.707 - 0.707i)\, \overline{\Lambda}(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(256\)    =    \(2^{8}\)
Sign: $-0.707 - 0.707i$
Analytic conductor: \(104.288\)
Root analytic conductor: \(10.2121\)
Motivic weight: \(8\)
Rational: no
Arithmetic: yes
Character: $\chi_{256} (127, \cdot )$
Primitive: yes
Self-dual: no
Analytic rank: \(0\)
Selberg data: \((2,\ 256,\ (\ :4),\ -0.707 - 0.707i)\)

Particular Values

\(L(\frac{9}{2})\) \(\approx\) \(0.8449179073\)
\(L(\frac12)\) \(\approx\) \(0.8449179073\)
\(L(5)\) 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 \( 1 - 63.9T + 6.56e3T^{2} \)
5 \( 1 + 217. iT - 3.90e5T^{2} \)
7 \( 1 - 1.72e3iT - 5.76e6T^{2} \)
11 \( 1 + 5.95e3T + 2.14e8T^{2} \)
13 \( 1 + 4.91e4iT - 8.15e8T^{2} \)
17 \( 1 + 5.56e4T + 6.97e9T^{2} \)
19 \( 1 - 2.02e5T + 1.69e10T^{2} \)
23 \( 1 - 2.09e5iT - 7.83e10T^{2} \)
29 \( 1 - 3.08e3iT - 5.00e11T^{2} \)
31 \( 1 - 1.36e6iT - 8.52e11T^{2} \)
37 \( 1 + 1.31e6iT - 3.51e12T^{2} \)
41 \( 1 + 4.54e6T + 7.98e12T^{2} \)
43 \( 1 + 3.48e6T + 1.16e13T^{2} \)
47 \( 1 - 7.23e6iT - 2.38e13T^{2} \)
53 \( 1 - 2.48e6iT - 6.22e13T^{2} \)
59 \( 1 + 1.48e7T + 1.46e14T^{2} \)
61 \( 1 - 4.13e6iT - 1.91e14T^{2} \)
67 \( 1 - 6.04e6T + 4.06e14T^{2} \)
71 \( 1 - 4.20e7iT - 6.45e14T^{2} \)
73 \( 1 + 9.00e6T + 8.06e14T^{2} \)
79 \( 1 + 6.81e6iT - 1.51e15T^{2} \)
83 \( 1 + 5.81e7T + 2.25e15T^{2} \)
89 \( 1 + 7.82e7T + 3.93e15T^{2} \)
97 \( 1 - 6.01e7T + 7.83e15T^{2} \)
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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

−10.90347158472667855302515752630, −9.825799172116835251803074520791, −8.852701027565544354246435599545, −8.244443540431543313273935368056, −7.27994650129790665235884267410, −5.69263635924589867393502155143, −5.07592464848917531881093264751, −3.27969969852977981939187972253, −2.76062110180989543087098014424, −1.28016722353359159286335932862, 0.15317743718071147003217162909, 1.72092393444286374387492333315, 2.81510884547209499168426907753, 3.84005280700636531512838276196, 4.97017037570876427477679700643, 6.50300805333781137901786410515, 7.28219866332358126580922609547, 8.349581191066974443091373678562, 9.217703553583769058736936008184, 10.11084811548877222350356905453

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