Properties

Label 2-2e8-4.3-c4-0-10
Degree $2$
Conductor $256$
Sign $1$
Analytic cond. $26.4627$
Root an. cond. $5.14419$
Motivic weight $4$
Arithmetic yes
Rational yes
Primitive yes
Self-dual yes
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  − 48·5-s + 81·9-s − 240·13-s − 322·17-s + 1.67e3·25-s + 1.68e3·29-s + 1.68e3·37-s + 3.03e3·41-s − 3.88e3·45-s + 2.40e3·49-s − 5.04e3·53-s + 2.64e3·61-s + 1.15e4·65-s + 1.44e3·73-s + 6.56e3·81-s + 1.54e4·85-s − 9.75e3·89-s + 1.91e3·97-s − 7.92e3·101-s + 2.18e4·109-s − 2.46e4·113-s − 1.94e4·117-s + ⋯
L(s)  = 1  − 1.91·5-s + 9-s − 1.42·13-s − 1.11·17-s + 2.68·25-s + 1.99·29-s + 1.22·37-s + 1.80·41-s − 1.91·45-s + 49-s − 1.79·53-s + 0.709·61-s + 2.72·65-s + 0.270·73-s + 81-s + 2.13·85-s − 1.23·89-s + 0.203·97-s − 0.776·101-s + 1.83·109-s − 1.92·113-s − 1.42·117-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 256 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & \, \Lambda(5-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 256 ^{s/2} \, \Gamma_{\C}(s+2) \, L(s)\cr =\mathstrut & \, \Lambda(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(256\)    =    \(2^{8}\)
Sign: $1$
Analytic conductor: \(26.4627\)
Root analytic conductor: \(5.14419\)
Motivic weight: \(4\)
Rational: yes
Arithmetic: yes
Character: $\chi_{256} (255, \cdot )$
Primitive: yes
Self-dual: yes
Analytic rank: \(0\)
Selberg data: \((2,\ 256,\ (\ :2),\ 1)\)

Particular Values

\(L(\frac{5}{2})\) \(\approx\) \(1.074139298\)
\(L(\frac12)\) \(\approx\) \(1.074139298\)
\(L(3)\) 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 \( ( 1 - p^{2} T )( 1 + p^{2} T ) \)
5 \( 1 + 48 T + p^{4} T^{2} \)
7 \( ( 1 - p^{2} T )( 1 + p^{2} T ) \)
11 \( ( 1 - p^{2} T )( 1 + p^{2} T ) \)
13 \( 1 + 240 T + p^{4} T^{2} \)
17 \( 1 + 322 T + p^{4} T^{2} \)
19 \( ( 1 - p^{2} T )( 1 + p^{2} T ) \)
23 \( ( 1 - p^{2} T )( 1 + p^{2} T ) \)
29 \( 1 - 1680 T + p^{4} T^{2} \)
31 \( ( 1 - p^{2} T )( 1 + p^{2} T ) \)
37 \( 1 - 1680 T + p^{4} T^{2} \)
41 \( 1 - 3038 T + p^{4} T^{2} \)
43 \( ( 1 - p^{2} T )( 1 + p^{2} T ) \)
47 \( ( 1 - p^{2} T )( 1 + p^{2} T ) \)
53 \( 1 + 5040 T + p^{4} T^{2} \)
59 \( ( 1 - p^{2} T )( 1 + p^{2} T ) \)
61 \( 1 - 2640 T + p^{4} T^{2} \)
67 \( ( 1 - p^{2} T )( 1 + p^{2} T ) \)
71 \( ( 1 - p^{2} T )( 1 + p^{2} T ) \)
73 \( 1 - 1442 T + p^{4} T^{2} \)
79 \( ( 1 - p^{2} T )( 1 + p^{2} T ) \)
83 \( ( 1 - p^{2} T )( 1 + p^{2} T ) \)
89 \( 1 + 9758 T + p^{4} T^{2} \)
97 \( 1 - 1918 T + p^{4} T^{2} \)
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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

−11.44580608115986296302274755540, −10.56863214378507404409860742225, −9.417651606876977011600211138497, −8.215393936559517856644068789814, −7.45946971373675188662286729007, −6.70463588586799736586589052926, −4.67136260700257677066105519321, −4.22566529978624045135258582538, −2.72536697854778735710659457663, −0.65356341246446037616491421322, 0.65356341246446037616491421322, 2.72536697854778735710659457663, 4.22566529978624045135258582538, 4.67136260700257677066105519321, 6.70463588586799736586589052926, 7.45946971373675188662286729007, 8.215393936559517856644068789814, 9.417651606876977011600211138497, 10.56863214378507404409860742225, 11.44580608115986296302274755540

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