Normalization:  

Dirichlet series

L(s)  = 1  − 2-s + 2·3-s + 4-s + 4·5-s − 2·6-s + 7-s − 8-s + 9-s − 4·10-s − 4·11-s + 2·12-s − 4·13-s − 14-s + 8·15-s + 16-s − 17-s − 18-s − 6·19-s + 4·20-s + 2·21-s + 4·22-s − 2·24-s + 11·25-s + 4·26-s − 4·27-s + 28-s + 6·29-s + ⋯
L(s)  = 1  − 0.707·2-s + 1.15·3-s + 1/2·4-s + 1.78·5-s − 0.816·6-s + 0.377·7-s − 0.353·8-s + 1/3·9-s − 1.26·10-s − 1.20·11-s + 0.577·12-s − 1.10·13-s − 0.267·14-s + 2.06·15-s + 1/4·16-s − 0.242·17-s − 0.235·18-s − 1.37·19-s + 0.894·20-s + 0.436·21-s + 0.852·22-s − 0.408·24-s + 11/5·25-s + 0.784·26-s − 0.769·27-s + 0.188·28-s + 1.11·29-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 238 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & \, \Lambda(2-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 238 ^{s/2} \, \Gamma_{\C}(s+1/2) \, L(s)\cr =\mathstrut & \, \Lambda(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(238\)    =    \(2 \cdot 7 \cdot 17\)
Sign: $1$
Analytic conductor: \(1.90043\)
Root analytic conductor: \(1.37856\)
Motivic weight: \(1\)
Rational: yes
Arithmetic: yes
Character: Trivial
Primitive: yes
Self-dual: yes
Analytic rank: \(0\)
Selberg data: \((2,\ 238,\ (\ :1/2),\ 1)\)

Particular Values

\(L(1)\) \(\approx\) \(1.521941528\)
\(L(\frac12)\) \(\approx\) \(1.521941528\)
\(L(\frac{3}{2})\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$Isogeny Class over $\mathbf{F}_p$
bad2 \( 1 + T \)
7 \( 1 - T \)
17 \( 1 + T \)
good3 \( 1 - 2 T + p T^{2} \) 1.3.ac
5 \( 1 - 4 T + p T^{2} \) 1.5.ae
11 \( 1 + 4 T + p T^{2} \) 1.11.e
13 \( 1 + 4 T + p T^{2} \) 1.13.e
19 \( 1 + 6 T + p T^{2} \) 1.19.g
23 \( 1 + p T^{2} \) 1.23.a
29 \( 1 - 6 T + p T^{2} \) 1.29.ag
31 \( 1 - 4 T + p T^{2} \) 1.31.ae
37 \( 1 + 10 T + p T^{2} \) 1.37.k
41 \( 1 - 6 T + p T^{2} \) 1.41.ag
43 \( 1 + p T^{2} \) 1.43.a
47 \( 1 - 4 T + p T^{2} \) 1.47.ae
53 \( 1 - 14 T + p T^{2} \) 1.53.ao
59 \( 1 + 6 T + p T^{2} \) 1.59.g
61 \( 1 + 12 T + p T^{2} \) 1.61.m
67 \( 1 - 4 T + p T^{2} \) 1.67.ae
71 \( 1 + 8 T + p T^{2} \) 1.71.i
73 \( 1 - 2 T + p T^{2} \) 1.73.ac
79 \( 1 + p T^{2} \) 1.79.a
83 \( 1 - 10 T + p T^{2} \) 1.83.ak
89 \( 1 - 10 T + p T^{2} \) 1.89.ak
97 \( 1 - 6 T + p T^{2} \) 1.97.ag
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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

−12.30264776476448446316558003589, −10.56616726919396924043112650950, −10.17628989538336803184934071125, −9.124388696960328040722462575539, −8.504258525876890475087699972026, −7.42012488546349064955813040971, −6.15855370813537923128983581072, −4.95404247889329802285418964237, −2.66188663960327860854980555616, −2.11300277285141814964879652826, 2.11300277285141814964879652826, 2.66188663960327860854980555616, 4.95404247889329802285418964237, 6.15855370813537923128983581072, 7.42012488546349064955813040971, 8.504258525876890475087699972026, 9.124388696960328040722462575539, 10.17628989538336803184934071125, 10.56616726919396924043112650950, 12.30264776476448446316558003589

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