Properties

Label 2-31-31.15-c4-0-6
Degree $2$
Conductor $31$
Sign $-0.409 + 0.912i$
Analytic cond. $3.20446$
Root an. cond. $1.79010$
Motivic weight $4$
Arithmetic yes
Rational no
Primitive yes
Self-dual no
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  + (−3.66 + 2.66i)2-s + (7.06 − 9.72i)3-s + (1.41 − 4.34i)4-s − 44.3·5-s + 54.5i·6-s + (17.8 − 54.9i)7-s + (−16.0 − 49.2i)8-s + (−19.6 − 60.4i)9-s + (162. − 118. i)10-s + (−130. − 42.3i)11-s + (−32.3 − 44.4i)12-s + (23.2 − 31.9i)13-s + (80.9 + 249. i)14-s + (−313. + 431. i)15-s + (249. + 181. i)16-s + (285. − 92.8i)17-s + ⋯
L(s)  = 1  + (−0.917 + 0.666i)2-s + (0.785 − 1.08i)3-s + (0.0882 − 0.271i)4-s − 1.77·5-s + 1.51i·6-s + (0.364 − 1.12i)7-s + (−0.250 − 0.770i)8-s + (−0.242 − 0.746i)9-s + (1.62 − 1.18i)10-s + (−1.07 − 0.349i)11-s + (−0.224 − 0.308i)12-s + (0.137 − 0.189i)13-s + (0.412 + 1.27i)14-s + (−1.39 + 1.91i)15-s + (0.974 + 0.707i)16-s + (0.988 − 0.321i)17-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 31 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & (-0.409 + 0.912i)\, \overline{\Lambda}(5-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 31 ^{s/2} \, \Gamma_{\C}(s+2) \, L(s)\cr =\mathstrut & (-0.409 + 0.912i)\, \overline{\Lambda}(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(31\)
Sign: $-0.409 + 0.912i$
Analytic conductor: \(3.20446\)
Root analytic conductor: \(1.79010\)
Motivic weight: \(4\)
Rational: no
Arithmetic: yes
Character: $\chi_{31} (15, \cdot )$
Primitive: yes
Self-dual: no
Analytic rank: \(0\)
Selberg data: \((2,\ 31,\ (\ :2),\ -0.409 + 0.912i)\)

Particular Values

\(L(\frac{5}{2})\) \(\approx\) \(0.278985 - 0.431158i\)
\(L(\frac12)\) \(\approx\) \(0.278985 - 0.431158i\)
\(L(3)\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad31 \( 1 + (-661. + 697. i)T \)
good2 \( 1 + (3.66 - 2.66i)T + (4.94 - 15.2i)T^{2} \)
3 \( 1 + (-7.06 + 9.72i)T + (-25.0 - 77.0i)T^{2} \)
5 \( 1 + 44.3T + 625T^{2} \)
7 \( 1 + (-17.8 + 54.9i)T + (-1.94e3 - 1.41e3i)T^{2} \)
11 \( 1 + (130. + 42.3i)T + (1.18e4 + 8.60e3i)T^{2} \)
13 \( 1 + (-23.2 + 31.9i)T + (-8.82e3 - 2.71e4i)T^{2} \)
17 \( 1 + (-285. + 92.8i)T + (6.75e4 - 4.90e4i)T^{2} \)
19 \( 1 + (426. - 309. i)T + (4.02e4 - 1.23e5i)T^{2} \)
23 \( 1 + (241. - 78.5i)T + (2.26e5 - 1.64e5i)T^{2} \)
29 \( 1 + (114. + 157. i)T + (-2.18e5 + 6.72e5i)T^{2} \)
37 \( 1 + 972. iT - 1.87e6T^{2} \)
41 \( 1 + (-208. + 151. i)T + (8.73e5 - 2.68e6i)T^{2} \)
43 \( 1 + (1.70e3 + 2.34e3i)T + (-1.05e6 + 3.25e6i)T^{2} \)
47 \( 1 + (2.01e3 + 1.46e3i)T + (1.50e6 + 4.64e6i)T^{2} \)
53 \( 1 + (-1.64e3 + 535. i)T + (6.38e6 - 4.63e6i)T^{2} \)
59 \( 1 + (-1.70e3 - 1.23e3i)T + (3.74e6 + 1.15e7i)T^{2} \)
61 \( 1 + 4.44e3iT - 1.38e7T^{2} \)
67 \( 1 + 2.10e3T + 2.01e7T^{2} \)
71 \( 1 + (421. + 1.29e3i)T + (-2.05e7 + 1.49e7i)T^{2} \)
73 \( 1 + (-4.57e3 - 1.48e3i)T + (2.29e7 + 1.66e7i)T^{2} \)
79 \( 1 + (1.99e3 - 649. i)T + (3.15e7 - 2.28e7i)T^{2} \)
83 \( 1 + (488. + 672. i)T + (-1.46e7 + 4.51e7i)T^{2} \)
89 \( 1 + (-3.62e3 - 1.17e3i)T + (5.07e7 + 3.68e7i)T^{2} \)
97 \( 1 + (2.92e3 - 9.01e3i)T + (-7.16e7 - 5.20e7i)T^{2} \)
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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

−15.95539244526263381792656639727, −14.76574876575459256196606056268, −13.31643169559792382753517524600, −12.18058809876088603013861536389, −10.49808113114910375098720222841, −8.177597187758791052562106547211, −7.998586245417716542200762142126, −7.08408589256843363112420704289, −3.70876973446125502769015174062, −0.46866457158664630946288294189, 2.91467796914792910882035922142, 4.72900246297458642514685501030, 8.126343285489941827336002387340, 8.662668936084070517639877858046, 10.09747146115563845529401779663, 11.21951159901854144230748879624, 12.30602367616515408965396768999, 14.81121561780965504633971341112, 15.22150486309398973929914024332, 16.24599303405132207764714974388

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