Properties

Label 2-21-7.4-c29-0-11
Degree $2$
Conductor $21$
Sign $-0.569 + 0.822i$
Analytic cond. $111.883$
Root an. cond. $10.5775$
Motivic weight $29$
Arithmetic yes
Rational no
Primitive yes
Self-dual no
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  + (1.77e4 + 3.07e4i)2-s + (2.39e6 − 4.14e6i)3-s + (−3.63e8 + 6.29e8i)4-s + (6.21e9 + 1.07e10i)5-s + (1.70e11 + 1.52e−5i)6-s + (−3.33e10 + 1.79e12i)7-s + (−6.74e12 − 0.00585i)8-s + (−1.14e13 − 1.98e13i)9-s + (−2.20e14 + 3.82e14i)10-s + (−9.62e14 + 1.66e15i)11-s + (1.73e15 + 3.00e15i)12-s − 1.69e14·13-s + (−5.58e16 + 3.08e16i)14-s + (5.94e16 − 4i)15-s + (7.51e16 + 1.30e17i)16-s + (−6.79e16 + 1.17e17i)17-s + ⋯
L(s)  = 1  + (0.767 + 1.32i)2-s + (0.288 − 0.499i)3-s + (−0.676 + 1.17i)4-s + (0.455 + 0.788i)5-s + 0.885·6-s + (−0.0186 + 0.999i)7-s − 0.542·8-s + (−0.166 − 0.288i)9-s + (−0.698 + 1.20i)10-s + (−0.764 + 1.32i)11-s + (0.390 + 0.676i)12-s − 0.0119·13-s + (−1.34 + 0.742i)14-s + 0.525·15-s + (0.260 + 0.451i)16-s + (−0.0978 + 0.169i)17-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 21 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & (-0.569 + 0.822i)\, \overline{\Lambda}(30-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 21 ^{s/2} \, \Gamma_{\C}(s+29/2) \, L(s)\cr =\mathstrut & (-0.569 + 0.822i)\, \overline{\Lambda}(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(21\)    =    \(3 \cdot 7\)
Sign: $-0.569 + 0.822i$
Analytic conductor: \(111.883\)
Root analytic conductor: \(10.5775\)
Motivic weight: \(29\)
Rational: no
Arithmetic: yes
Character: $\chi_{21} (4, \cdot )$
Primitive: yes
Self-dual: no
Analytic rank: \(0\)
Selberg data: \((2,\ 21,\ (\ :29/2),\ -0.569 + 0.822i)\)

Particular Values

\(L(15)\) \(\approx\) \(2.842944333\)
\(L(\frac12)\) \(\approx\) \(2.842944333\)
\(L(\frac{31}{2})\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad3 \( 1 + (-2.39e6 + 4.14e6i)T \)
7 \( 1 + (3.33e10 - 1.79e12i)T \)
good2 \( 1 + (-1.77e4 - 3.07e4i)T + (-2.68e8 + 4.64e8i)T^{2} \)
5 \( 1 + (-6.21e9 - 1.07e10i)T + (-9.31e19 + 1.61e20i)T^{2} \)
11 \( 1 + (9.62e14 - 1.66e15i)T + (-7.93e29 - 1.37e30i)T^{2} \)
13 \( 1 + 1.69e14T + 2.01e32T^{2} \)
17 \( 1 + (6.79e16 - 1.17e17i)T + (-2.40e35 - 4.17e35i)T^{2} \)
19 \( 1 + (1.07e18 + 1.86e18i)T + (-6.06e36 + 1.05e37i)T^{2} \)
23 \( 1 + (-7.99e17 - 1.38e18i)T + (-1.54e39 + 2.67e39i)T^{2} \)
29 \( 1 - 9.05e20T + 2.56e42T^{2} \)
31 \( 1 + (2.71e21 - 4.70e21i)T + (-8.88e42 - 1.53e43i)T^{2} \)
37 \( 1 + (6.35e21 + 1.10e22i)T + (-1.50e45 + 2.60e45i)T^{2} \)
41 \( 1 - 1.65e23T + 5.89e46T^{2} \)
43 \( 1 - 5.07e23T + 2.34e47T^{2} \)
47 \( 1 + (7.12e23 + 1.23e24i)T + (-1.54e48 + 2.68e48i)T^{2} \)
53 \( 1 + (-2.30e24 + 3.99e24i)T + (-5.04e49 - 8.74e49i)T^{2} \)
59 \( 1 + (3.36e25 - 5.82e25i)T + (-1.13e51 - 1.95e51i)T^{2} \)
61 \( 1 + (-1.48e24 - 2.57e24i)T + (-2.97e51 + 5.15e51i)T^{2} \)
67 \( 1 + (1.30e26 - 2.26e26i)T + (-4.52e52 - 7.82e52i)T^{2} \)
71 \( 1 + 1.18e27T + 4.85e53T^{2} \)
73 \( 1 + (-7.27e26 + 1.26e27i)T + (-5.43e53 - 9.41e53i)T^{2} \)
79 \( 1 + (1.08e27 + 1.88e27i)T + (-5.37e54 + 9.30e54i)T^{2} \)
83 \( 1 - 8.08e26T + 4.50e55T^{2} \)
89 \( 1 + (6.49e27 + 1.12e28i)T + (-1.70e56 + 2.95e56i)T^{2} \)
97 \( 1 - 7.21e27T + 4.13e57T^{2} \)
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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

−13.19585648275155466818414710954, −12.31651076036624847026113855429, −10.43160534066130877734514386324, −8.842750618847590801018495063581, −7.53738182326386642359213659233, −6.70946641816046937137835982773, −5.72233720762340703903652100283, −4.61282833903084227042016999262, −2.88341229023191589449055194313, −1.91716395478434691672527660788, 0.40552297363646957057733357543, 1.35642585221061277986036556297, 2.67546399145404360843267749682, 3.70595440564888185380378765284, 4.65896501443826362876174768149, 5.73297236346534363991248774827, 7.913871072168412103264898280239, 9.345957975300777336314098327724, 10.47166152949764989516463407255, 11.20903344782403074026850788046

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