Properties

Label 2-240-5.4-c1-0-2
Degree $2$
Conductor $240$
Sign $0.894 - 0.447i$
Analytic cond. $1.91640$
Root an. cond. $1.38434$
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  i·3-s + (1 + 2i)5-s + 4i·7-s − 9-s + 4·11-s + (2 − i)15-s − 4i·17-s + 4·21-s − 4i·23-s + (−3 + 4i)25-s + i·27-s + 6·29-s − 4·31-s − 4i·33-s + (−8 + 4i)35-s + ⋯
L(s)  = 1  − 0.577i·3-s + (0.447 + 0.894i)5-s + 1.51i·7-s − 0.333·9-s + 1.20·11-s + (0.516 − 0.258i)15-s − 0.970i·17-s + 0.872·21-s − 0.834i·23-s + (−0.600 + 0.800i)25-s + 0.192i·27-s + 1.11·29-s − 0.718·31-s − 0.696i·33-s + (−1.35 + 0.676i)35-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 240 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & (0.894 - 0.447i)\, \overline{\Lambda}(2-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 240 ^{s/2} \, \Gamma_{\C}(s+1/2) \, L(s)\cr =\mathstrut & (0.894 - 0.447i)\, \overline{\Lambda}(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(240\)    =    \(2^{4} \cdot 3 \cdot 5\)
Sign: $0.894 - 0.447i$
Analytic conductor: \(1.91640\)
Root analytic conductor: \(1.38434\)
Motivic weight: \(1\)
Rational: no
Arithmetic: yes
Character: $\chi_{240} (49, \cdot )$
Primitive: yes
Self-dual: no
Analytic rank: \(0\)
Selberg data: \((2,\ 240,\ (\ :1/2),\ 0.894 - 0.447i)\)

Particular Values

\(L(1)\) \(\approx\) \(1.30995 + 0.309238i\)
\(L(\frac12)\) \(\approx\) \(1.30995 + 0.309238i\)
\(L(\frac{3}{2})\) 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 \( 1 + iT \)
5 \( 1 + (-1 - 2i)T \)
good7 \( 1 - 4iT - 7T^{2} \)
11 \( 1 - 4T + 11T^{2} \)
13 \( 1 - 13T^{2} \)
17 \( 1 + 4iT - 17T^{2} \)
19 \( 1 + 19T^{2} \)
23 \( 1 + 4iT - 23T^{2} \)
29 \( 1 - 6T + 29T^{2} \)
31 \( 1 + 4T + 31T^{2} \)
37 \( 1 - 8iT - 37T^{2} \)
41 \( 1 + 10T + 41T^{2} \)
43 \( 1 + 4iT - 43T^{2} \)
47 \( 1 + 4iT - 47T^{2} \)
53 \( 1 + 12iT - 53T^{2} \)
59 \( 1 - 4T + 59T^{2} \)
61 \( 1 - 2T + 61T^{2} \)
67 \( 1 + 4iT - 67T^{2} \)
71 \( 1 + 71T^{2} \)
73 \( 1 + 8iT - 73T^{2} \)
79 \( 1 + 12T + 79T^{2} \)
83 \( 1 + 4iT - 83T^{2} \)
89 \( 1 - 10T + 89T^{2} \)
97 \( 1 + 8iT - 97T^{2} \)
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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

−11.86527860078859643386918401116, −11.69557978991296139162751627427, −10.23854141178758539465137344087, −9.206828541264297597886211202999, −8.403970479013721844609992079615, −6.90294503198921896812726799886, −6.32533802292600679739143347223, −5.16314623769505609217332084251, −3.17641775447271335113341091605, −2.03750830747473422943185169035, 1.32498126435075574265836892451, 3.74930876962917927796877532822, 4.48294582052482520316776606537, 5.83634324969267790664286206408, 7.02478871152944469914671863621, 8.294472639280201139352829703901, 9.277170527550531457196157822216, 10.08901862853590514828989988385, 10.94791882407485644600954965544, 12.05595988028134139540206773746

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