Properties

Label 2-21-7.2-c29-0-12
Degree $2$
Conductor $21$
Sign $0.996 + 0.0807i$
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  + (1.01e4 − 1.75e4i)2-s + (−2.39e6 − 4.14e6i)3-s + (6.38e7 + 1.10e8i)4-s + (−1.35e10 + 2.33e10i)5-s − 9.67e10·6-s + (−1.40e12 − 1.11e12i)7-s + (1.34e13 − 0.000488i)8-s + (−1.14e13 + 1.98e13i)9-s + (2.73e14 + 4.73e14i)10-s + (−1.06e15 − 1.84e15i)11-s + (3.05e14 − 5.28e14i)12-s + 7.05e15·13-s + (−3.37e16 + 1.34e16i)14-s + 1.29e17·15-s + (1.01e17 − 1.76e17i)16-s + (−3.77e17 − 6.54e17i)17-s + ⋯
L(s)  = 1  + (0.436 − 0.756i)2-s + (−0.288 − 0.499i)3-s + (0.118 + 0.205i)4-s + (−0.989 + 1.71i)5-s − 0.504·6-s + (−0.785 − 0.619i)7-s + 1.08·8-s + (−0.166 + 0.288i)9-s + (0.864 + 1.49i)10-s + (−0.843 − 1.46i)11-s + (0.0686 − 0.118i)12-s + 0.496·13-s + (−0.810 + 0.323i)14-s + 1.14·15-s + (0.352 − 0.611i)16-s + (−0.544 − 0.942i)17-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 21 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & (0.996 + 0.0807i)\, \overline{\Lambda}(30-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 21 ^{s/2} \, \Gamma_{\C}(s+29/2) \, L(s)\cr =\mathstrut & (0.996 + 0.0807i)\, \overline{\Lambda}(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(21\)    =    \(3 \cdot 7\)
Sign: $0.996 + 0.0807i$
Analytic conductor: \(111.883\)
Root analytic conductor: \(10.5775\)
Motivic weight: \(29\)
Rational: no
Arithmetic: yes
Character: $\chi_{21} (16, \cdot )$
Primitive: yes
Self-dual: no
Analytic rank: \(0\)
Selberg data: \((2,\ 21,\ (\ :29/2),\ 0.996 + 0.0807i)\)

Particular Values

\(L(15)\) \(\approx\) \(1.294883919\)
\(L(\frac12)\) \(\approx\) \(1.294883919\)
\(L(\frac{31}{2})\) 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 \( 1 + (1.40e12 + 1.11e12i)T \)
good2 \( 1 + (-1.01e4 + 1.75e4i)T + (-2.68e8 - 4.64e8i)T^{2} \)
5 \( 1 + (1.35e10 - 2.33e10i)T + (-9.31e19 - 1.61e20i)T^{2} \)
11 \( 1 + (1.06e15 + 1.84e15i)T + (-7.93e29 + 1.37e30i)T^{2} \)
13 \( 1 - 7.05e15T + 2.01e32T^{2} \)
17 \( 1 + (3.77e17 + 6.54e17i)T + (-2.40e35 + 4.17e35i)T^{2} \)
19 \( 1 + (2.13e18 - 3.69e18i)T + (-6.06e36 - 1.05e37i)T^{2} \)
23 \( 1 + (-1.12e19 + 1.94e19i)T + (-1.54e39 - 2.67e39i)T^{2} \)
29 \( 1 + 6.55e20T + 2.56e42T^{2} \)
31 \( 1 + (9.67e20 + 1.67e21i)T + (-8.88e42 + 1.53e43i)T^{2} \)
37 \( 1 + (2.18e22 - 3.78e22i)T + (-1.50e45 - 2.60e45i)T^{2} \)
41 \( 1 - 9.60e22T + 5.89e46T^{2} \)
43 \( 1 - 3.20e23T + 2.34e47T^{2} \)
47 \( 1 + (-1.50e23 + 2.59e23i)T + (-1.54e48 - 2.68e48i)T^{2} \)
53 \( 1 + (-4.52e24 - 7.83e24i)T + (-5.04e49 + 8.74e49i)T^{2} \)
59 \( 1 + (-1.87e25 - 3.24e25i)T + (-1.13e51 + 1.95e51i)T^{2} \)
61 \( 1 + (3.41e25 - 5.90e25i)T + (-2.97e51 - 5.15e51i)T^{2} \)
67 \( 1 + (2.17e26 + 3.76e26i)T + (-4.52e52 + 7.82e52i)T^{2} \)
71 \( 1 - 1.14e27T + 4.85e53T^{2} \)
73 \( 1 + (-4.59e26 - 7.96e26i)T + (-5.43e53 + 9.41e53i)T^{2} \)
79 \( 1 + (-1.82e27 + 3.15e27i)T + (-5.37e54 - 9.30e54i)T^{2} \)
83 \( 1 + 9.34e27T + 4.50e55T^{2} \)
89 \( 1 + (3.64e26 - 6.31e26i)T + (-1.70e56 - 2.95e56i)T^{2} \)
97 \( 1 + 5.97e27T + 4.13e57T^{2} \)
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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

−11.93069112512200250935868161117, −10.92932234840819627287095046369, −10.56633520196611068296405111790, −8.026466623538415385362720802110, −7.16154272285384268543242031375, −6.16178160344662361179535299829, −3.99500234767905470148642780052, −3.20059882081699120861821184810, −2.48484982912118980462530396013, −0.59952995178787616764412273654, 0.40525579773600459917761620994, 1.89051721724323648802555737395, 4.00002148943852169659855424959, 4.81500226104038256115291782197, 5.63082879515807584627530071785, 7.08359482453863846032475400800, 8.424061736621029149208662384139, 9.529328307221703346117942400019, 11.02204116835021277319684882354, 12.54447068646339170191680933003

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