Properties

Label 2-240-1.1-c1-0-0
Degree $2$
Conductor $240$
Sign $1$
Analytic cond. $1.91640$
Root an. cond. $1.38434$
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  − 3-s − 5-s + 4·7-s + 9-s + 2·13-s + 15-s + 6·17-s + 4·19-s − 4·21-s + 25-s − 27-s − 6·29-s − 8·31-s − 4·35-s + 2·37-s − 2·39-s − 6·41-s + 4·43-s − 45-s + 9·49-s − 6·51-s − 6·53-s − 4·57-s − 10·61-s + 4·63-s − 2·65-s + 4·67-s + ⋯
L(s)  = 1  − 0.577·3-s − 0.447·5-s + 1.51·7-s + 1/3·9-s + 0.554·13-s + 0.258·15-s + 1.45·17-s + 0.917·19-s − 0.872·21-s + 1/5·25-s − 0.192·27-s − 1.11·29-s − 1.43·31-s − 0.676·35-s + 0.328·37-s − 0.320·39-s − 0.937·41-s + 0.609·43-s − 0.149·45-s + 9/7·49-s − 0.840·51-s − 0.824·53-s − 0.529·57-s − 1.28·61-s + 0.503·63-s − 0.248·65-s + 0.488·67-s + ⋯

Functional equation

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

Invariants

Degree: \(2\)
Conductor: \(240\)    =    \(2^{4} \cdot 3 \cdot 5\)
Sign: $1$
Analytic conductor: \(1.91640\)
Root analytic conductor: \(1.38434\)
Motivic weight: \(1\)
Rational: yes
Arithmetic: yes
Character: Trivial
Primitive: yes
Self-dual: yes
Analytic rank: \(0\)
Selberg data: \((2,\ 240,\ (\ :1/2),\ 1)\)

Particular Values

\(L(1)\) \(\approx\) \(1.158392111\)
\(L(\frac12)\) \(\approx\) \(1.158392111\)
\(L(\frac{3}{2})\) 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 \( 1 + T \)
5 \( 1 + T \)
good7 \( 1 - 4 T + p T^{2} \)
11 \( 1 + p T^{2} \)
13 \( 1 - 2 T + p T^{2} \)
17 \( 1 - 6 T + p T^{2} \)
19 \( 1 - 4 T + p T^{2} \)
23 \( 1 + p T^{2} \)
29 \( 1 + 6 T + p T^{2} \)
31 \( 1 + 8 T + p T^{2} \)
37 \( 1 - 2 T + p T^{2} \)
41 \( 1 + 6 T + p T^{2} \)
43 \( 1 - 4 T + p T^{2} \)
47 \( 1 + p T^{2} \)
53 \( 1 + 6 T + p T^{2} \)
59 \( 1 + p T^{2} \)
61 \( 1 + 10 T + p T^{2} \)
67 \( 1 - 4 T + p T^{2} \)
71 \( 1 + p T^{2} \)
73 \( 1 - 2 T + p T^{2} \)
79 \( 1 + 8 T + p T^{2} \)
83 \( 1 + 12 T + p T^{2} \)
89 \( 1 - 18 T + p T^{2} \)
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

−11.85503029140590792221076481507, −11.32300197915863352372468915281, −10.48322857979944854900497529739, −9.206120678796429021467253404807, −7.965215938754459889106897012614, −7.38482725826507043429631860666, −5.76555679083117871916592673419, −4.95303891523898796353167575120, −3.62987230449253956202768748221, −1.44399343799308961081305068602, 1.44399343799308961081305068602, 3.62987230449253956202768748221, 4.95303891523898796353167575120, 5.76555679083117871916592673419, 7.38482725826507043429631860666, 7.965215938754459889106897012614, 9.206120678796429021467253404807, 10.48322857979944854900497529739, 11.32300197915863352372468915281, 11.85503029140590792221076481507

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