Properties

Label 2-1280-8.5-c1-0-18
Degree $2$
Conductor $1280$
Sign $0.707 + 0.707i$
Analytic cond. $10.2208$
Root an. cond. $3.19700$
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  − 1.23i·3-s i·5-s + 3.23·7-s + 1.47·9-s − 2i·11-s + 4.47i·13-s − 1.23·15-s + 4.47·17-s + 4.47i·19-s − 4.00i·21-s + 4.76·23-s − 25-s − 5.52i·27-s + 2i·29-s + 6.47·31-s + ⋯
L(s)  = 1  − 0.713i·3-s − 0.447i·5-s + 1.22·7-s + 0.490·9-s − 0.603i·11-s + 1.24i·13-s − 0.319·15-s + 1.08·17-s + 1.02i·19-s − 0.872i·21-s + 0.993·23-s − 0.200·25-s − 1.06i·27-s + 0.371i·29-s + 1.16·31-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 1280 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & (0.707 + 0.707i)\, \overline{\Lambda}(2-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 1280 ^{s/2} \, \Gamma_{\C}(s+1/2) \, L(s)\cr =\mathstrut & (0.707 + 0.707i)\, \overline{\Lambda}(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(1280\)    =    \(2^{8} \cdot 5\)
Sign: $0.707 + 0.707i$
Analytic conductor: \(10.2208\)
Root analytic conductor: \(3.19700\)
Motivic weight: \(1\)
Rational: no
Arithmetic: yes
Character: $\chi_{1280} (641, \cdot )$
Primitive: yes
Self-dual: no
Analytic rank: \(0\)
Selberg data: \((2,\ 1280,\ (\ :1/2),\ 0.707 + 0.707i)\)

Particular Values

\(L(1)\) \(\approx\) \(2.124165015\)
\(L(\frac12)\) \(\approx\) \(2.124165015\)
\(L(\frac{3}{2})\) 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 \( 1 + iT \)
good3 \( 1 + 1.23iT - 3T^{2} \)
7 \( 1 - 3.23T + 7T^{2} \)
11 \( 1 + 2iT - 11T^{2} \)
13 \( 1 - 4.47iT - 13T^{2} \)
17 \( 1 - 4.47T + 17T^{2} \)
19 \( 1 - 4.47iT - 19T^{2} \)
23 \( 1 - 4.76T + 23T^{2} \)
29 \( 1 - 2iT - 29T^{2} \)
31 \( 1 - 6.47T + 31T^{2} \)
37 \( 1 - 6.94iT - 37T^{2} \)
41 \( 1 + 12.4T + 41T^{2} \)
43 \( 1 + 7.70iT - 43T^{2} \)
47 \( 1 + 7.23T + 47T^{2} \)
53 \( 1 - 0.472iT - 53T^{2} \)
59 \( 1 + 8.47iT - 59T^{2} \)
61 \( 1 - 6iT - 61T^{2} \)
67 \( 1 + 7.70iT - 67T^{2} \)
71 \( 1 - 2.47T + 71T^{2} \)
73 \( 1 + 4.47T + 73T^{2} \)
79 \( 1 - 12.9T + 79T^{2} \)
83 \( 1 - 3.70iT - 83T^{2} \)
89 \( 1 - 14.9T + 89T^{2} \)
97 \( 1 + 16.4T + 97T^{2} \)
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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

−9.554027262986394771446854042015, −8.386517380225325543173944353204, −8.148847576557974407246196464284, −7.12710693846070451145161831632, −6.39549452819894005964596905258, −5.24971666641931078667979733510, −4.57637837066157715345068957727, −3.42555364820719516974219742284, −1.81908960562838514009757382627, −1.21747628466182784883573378349, 1.25242770333003207017693364841, 2.68971168765809430516447262763, 3.70998350958847169357695749324, 4.90465943014338747054474285055, 5.12932362238935979701801348881, 6.52114040423523938238352679120, 7.50321057633018936740893674413, 8.022046031839539330568827744009, 9.054567580012149841845600751266, 9.981776233612549904907853223251

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