Properties

Label 2-21-7.2-c29-0-19
Degree $2$
Conductor $21$
Sign $-0.201 + 0.979i$
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  + (2.17e4 − 3.76e4i)2-s + (2.39e6 + 4.14e6i)3-s + (−6.74e8 − 1.16e9i)4-s + (−9.42e9 + 1.63e10i)5-s + 2.07e11·6-s + (−1.27e12 + 1.26e12i)7-s + (−3.52e13 − 0.00390i)8-s + (−1.14e13 + 1.98e13i)9-s + (4.09e14 + 7.08e14i)10-s + (−8.08e14 − 1.40e15i)11-s + (3.22e15 − 5.58e15i)12-s − 1.38e16·13-s + (1.98e16 + 7.53e16i)14-s + (−9.01e16 + 8i)15-s + (−4.03e17 + 6.99e17i)16-s + (−8.45e16 − 1.46e17i)17-s + ⋯
L(s)  = 1  + (0.937 − 1.62i)2-s + (0.288 + 0.499i)3-s + (−1.25 − 2.17i)4-s + (−0.690 + 1.19i)5-s + 1.08·6-s + (−0.710 + 0.703i)7-s − 2.83·8-s + (−0.166 + 0.288i)9-s + (1.29 + 2.24i)10-s + (−0.642 − 1.11i)11-s + (0.725 − 1.25i)12-s − 0.978·13-s + (0.476 + 1.81i)14-s − 0.797·15-s + (−1.40 + 2.42i)16-s + (−0.121 − 0.210i)17-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 21 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & (-0.201 + 0.979i)\, \overline{\Lambda}(30-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 21 ^{s/2} \, \Gamma_{\C}(s+29/2) \, L(s)\cr =\mathstrut & (-0.201 + 0.979i)\, \overline{\Lambda}(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(21\)    =    \(3 \cdot 7\)
Sign: $-0.201 + 0.979i$
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: \((2,\ 21,\ (\ :29/2),\ -0.201 + 0.979i)\)

Particular Values

\(L(15)\) \(\approx\) \(1.714268492\)
\(L(\frac12)\) \(\approx\) \(1.714268492\)
\(L(\frac{31}{2})\) 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 \( 1 + (1.27e12 - 1.26e12i)T \)
good2 \( 1 + (-2.17e4 + 3.76e4i)T + (-2.68e8 - 4.64e8i)T^{2} \)
5 \( 1 + (9.42e9 - 1.63e10i)T + (-9.31e19 - 1.61e20i)T^{2} \)
11 \( 1 + (8.08e14 + 1.40e15i)T + (-7.93e29 + 1.37e30i)T^{2} \)
13 \( 1 + 1.38e16T + 2.01e32T^{2} \)
17 \( 1 + (8.45e16 + 1.46e17i)T + (-2.40e35 + 4.17e35i)T^{2} \)
19 \( 1 + (2.66e18 - 4.62e18i)T + (-6.06e36 - 1.05e37i)T^{2} \)
23 \( 1 + (-3.07e19 + 5.33e19i)T + (-1.54e39 - 2.67e39i)T^{2} \)
29 \( 1 - 2.73e21T + 2.56e42T^{2} \)
31 \( 1 + (-3.23e21 - 5.61e21i)T + (-8.88e42 + 1.53e43i)T^{2} \)
37 \( 1 + (-4.02e22 + 6.97e22i)T + (-1.50e45 - 2.60e45i)T^{2} \)
41 \( 1 - 5.71e22T + 5.89e46T^{2} \)
43 \( 1 + 4.57e23T + 2.34e47T^{2} \)
47 \( 1 + (-8.12e23 + 1.40e24i)T + (-1.54e48 - 2.68e48i)T^{2} \)
53 \( 1 + (5.82e24 + 1.00e25i)T + (-5.04e49 + 8.74e49i)T^{2} \)
59 \( 1 + (-4.87e24 - 8.44e24i)T + (-1.13e51 + 1.95e51i)T^{2} \)
61 \( 1 + (-2.38e24 + 4.13e24i)T + (-2.97e51 - 5.15e51i)T^{2} \)
67 \( 1 + (-1.55e26 - 2.69e26i)T + (-4.52e52 + 7.82e52i)T^{2} \)
71 \( 1 - 2.89e26T + 4.85e53T^{2} \)
73 \( 1 + (6.70e25 + 1.16e26i)T + (-5.43e53 + 9.41e53i)T^{2} \)
79 \( 1 + (2.17e27 - 3.77e27i)T + (-5.37e54 - 9.30e54i)T^{2} \)
83 \( 1 - 5.93e27T + 4.50e55T^{2} \)
89 \( 1 + (-1.18e28 + 2.05e28i)T + (-1.70e56 - 2.95e56i)T^{2} \)
97 \( 1 - 3.54e28T + 4.13e57T^{2} \)
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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

−11.79145494822072388972010110293, −10.65224628213034646571950148107, −10.08713373338822615736911290548, −8.539139974052640873681168500714, −6.39097018730482755227448981042, −5.06547575871049516151698300118, −3.75566634221862257253971172972, −2.92068379861014080754518462883, −2.43968132466034678896827847420, −0.43340050417828550352279601165, 0.58722064084759710068321196410, 2.84438783522526772140635648017, 4.41381502080863681550336134165, 4.80090718053437567515718346325, 6.48488712028553783253626787575, 7.40996283674888171868268098048, 8.173335458174170531850656636975, 9.470079038183814072786888907460, 12.14607017395228226042433988987, 12.92738347396649283629927761829

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