Properties

Label 2-648-1.1-c1-0-3
Degree $2$
Conductor $648$
Sign $1$
Analytic cond. $5.17430$
Root an. cond. $2.27471$
Motivic weight $1$
Arithmetic yes
Rational yes
Primitive yes
Self-dual yes
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  + 5-s + 4·11-s − 5·13-s + 5·17-s + 8·19-s + 4·23-s − 4·25-s − 3·29-s − 4·31-s + 3·37-s + 6·41-s + 4·43-s + 12·47-s − 7·49-s + 10·53-s + 4·55-s − 8·59-s − 5·61-s − 5·65-s + 8·67-s − 16·71-s − 5·73-s + 4·79-s − 4·83-s + 5·85-s − 3·89-s + 8·95-s + ⋯
L(s)  = 1  + 0.447·5-s + 1.20·11-s − 1.38·13-s + 1.21·17-s + 1.83·19-s + 0.834·23-s − 4/5·25-s − 0.557·29-s − 0.718·31-s + 0.493·37-s + 0.937·41-s + 0.609·43-s + 1.75·47-s − 49-s + 1.37·53-s + 0.539·55-s − 1.04·59-s − 0.640·61-s − 0.620·65-s + 0.977·67-s − 1.89·71-s − 0.585·73-s + 0.450·79-s − 0.439·83-s + 0.542·85-s − 0.317·89-s + 0.820·95-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 648 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & \, \Lambda(2-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 648 ^{s/2} \, \Gamma_{\C}(s+1/2) \, L(s)\cr =\mathstrut & \, \Lambda(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(648\)    =    \(2^{3} \cdot 3^{4}\)
Sign: $1$
Analytic conductor: \(5.17430\)
Root analytic conductor: \(2.27471\)
Motivic weight: \(1\)
Rational: yes
Arithmetic: yes
Character: Trivial
Primitive: yes
Self-dual: yes
Analytic rank: \(0\)
Selberg data: \((2,\ 648,\ (\ :1/2),\ 1)\)

Particular Values

\(L(1)\) \(\approx\) \(1.712919003\)
\(L(\frac12)\) \(\approx\) \(1.712919003\)
\(L(\frac{3}{2})\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad2 \( 1 \)
3 \( 1 \)
good5 \( 1 - T + p T^{2} \)
7 \( 1 + p T^{2} \)
11 \( 1 - 4 T + p T^{2} \)
13 \( 1 + 5 T + p T^{2} \)
17 \( 1 - 5 T + p T^{2} \)
19 \( 1 - 8 T + p T^{2} \)
23 \( 1 - 4 T + p T^{2} \)
29 \( 1 + 3 T + p T^{2} \)
31 \( 1 + 4 T + p T^{2} \)
37 \( 1 - 3 T + p T^{2} \)
41 \( 1 - 6 T + p T^{2} \)
43 \( 1 - 4 T + p T^{2} \)
47 \( 1 - 12 T + p T^{2} \)
53 \( 1 - 10 T + p T^{2} \)
59 \( 1 + 8 T + p T^{2} \)
61 \( 1 + 5 T + p T^{2} \)
67 \( 1 - 8 T + p T^{2} \)
71 \( 1 + 16 T + p T^{2} \)
73 \( 1 + 5 T + p T^{2} \)
79 \( 1 - 4 T + p T^{2} \)
83 \( 1 + 4 T + p T^{2} \)
89 \( 1 + 3 T + p T^{2} \)
97 \( 1 - 2 T + p T^{2} \)
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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

−10.41427784154370066336577907232, −9.441524620445526535175360937196, −9.276700222420769412340340101500, −7.65043355649184430630149859953, −7.22985671868851610688971612408, −5.91309717484246366542765564947, −5.21013759142456713415671940960, −3.93598076451906063518111572034, −2.76720787421132320912901821151, −1.26763827522611928708335465597, 1.26763827522611928708335465597, 2.76720787421132320912901821151, 3.93598076451906063518111572034, 5.21013759142456713415671940960, 5.91309717484246366542765564947, 7.22985671868851610688971612408, 7.65043355649184430630149859953, 9.276700222420769412340340101500, 9.441524620445526535175360937196, 10.41427784154370066336577907232

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