Properties

Label 2-21-21.17-c29-0-19
Degree $2$
Conductor $21$
Sign $0.980 + 0.198i$
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  + (3.16e4 − 1.82e4i)2-s + (−7.89e6 − 2.50e6i)3-s + (3.98e8 − 6.89e8i)4-s + (−9.32e9 − 1.61e10i)5-s + (−2.95e11 + 6.48e10i)6-s + (9.26e11 − 1.53e12i)7-s + (0.000976 − 9.48e12i)8-s + (5.60e13 + 3.95e13i)9-s + (−5.89e14 − 3.40e14i)10-s + (3.98e14 + 2.29e14i)11-s + (−4.87e15 + 4.44e15i)12-s + 1.03e16i·13-s + (1.22e15 − 6.55e16i)14-s + (3.31e16 + 1.50e17i)15-s + (4.06e16 + 7.03e16i)16-s + (−5.21e17 + 9.03e17i)17-s + ⋯
L(s)  = 1  + (1.36 − 0.788i)2-s + (−0.953 − 0.302i)3-s + (0.742 − 1.28i)4-s + (−0.682 − 1.18i)5-s + (−1.53 + 0.337i)6-s + (0.516 − 0.856i)7-s − 0.762i·8-s + (0.816 + 0.576i)9-s + (−1.86 − 1.07i)10-s + (0.316 + 0.182i)11-s + (−1.09 + 1.00i)12-s + 0.732i·13-s + (0.0294 − 1.57i)14-s + (0.292 + 1.33i)15-s + (0.140 + 0.243i)16-s + (−0.751 + 1.30i)17-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 21 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & (0.980 + 0.198i)\, \overline{\Lambda}(30-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 21 ^{s/2} \, \Gamma_{\C}(s+29/2) \, L(s)\cr =\mathstrut & (0.980 + 0.198i)\, \overline{\Lambda}(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(21\)    =    \(3 \cdot 7\)
Sign: $0.980 + 0.198i$
Analytic conductor: \(111.883\)
Root analytic conductor: \(10.5775\)
Motivic weight: \(29\)
Rational: no
Arithmetic: yes
Character: $\chi_{21} (17, \cdot )$
Primitive: yes
Self-dual: no
Analytic rank: \(0\)
Selberg data: \((2,\ 21,\ (\ :29/2),\ 0.980 + 0.198i)\)

Particular Values

\(L(15)\) \(\approx\) \(2.124194759\)
\(L(\frac12)\) \(\approx\) \(2.124194759\)
\(L(\frac{31}{2})\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad3 \( 1 + (7.89e6 + 2.50e6i)T \)
7 \( 1 + (-9.26e11 + 1.53e12i)T \)
good2 \( 1 + (-3.16e4 + 1.82e4i)T + (2.68e8 - 4.64e8i)T^{2} \)
5 \( 1 + (9.32e9 + 1.61e10i)T + (-9.31e19 + 1.61e20i)T^{2} \)
11 \( 1 + (-3.98e14 - 2.29e14i)T + (7.93e29 + 1.37e30i)T^{2} \)
13 \( 1 - 1.03e16iT - 2.01e32T^{2} \)
17 \( 1 + (5.21e17 - 9.03e17i)T + (-2.40e35 - 4.17e35i)T^{2} \)
19 \( 1 + (-2.76e18 + 1.59e18i)T + (6.06e36 - 1.05e37i)T^{2} \)
23 \( 1 + (8.26e19 - 4.77e19i)T + (1.54e39 - 2.67e39i)T^{2} \)
29 \( 1 - 1.79e21iT - 2.56e42T^{2} \)
31 \( 1 + (-5.26e21 - 3.03e21i)T + (8.88e42 + 1.53e43i)T^{2} \)
37 \( 1 + (-2.23e21 - 3.87e21i)T + (-1.50e45 + 2.60e45i)T^{2} \)
41 \( 1 + 2.14e23T + 5.89e46T^{2} \)
43 \( 1 + 5.29e23T + 2.34e47T^{2} \)
47 \( 1 + (-4.23e22 - 7.32e22i)T + (-1.54e48 + 2.68e48i)T^{2} \)
53 \( 1 + (-1.34e25 - 7.75e24i)T + (5.04e49 + 8.74e49i)T^{2} \)
59 \( 1 + (2.46e23 - 4.26e23i)T + (-1.13e51 - 1.95e51i)T^{2} \)
61 \( 1 + (-7.25e25 + 4.18e25i)T + (2.97e51 - 5.15e51i)T^{2} \)
67 \( 1 + (1.28e26 - 2.21e26i)T + (-4.52e52 - 7.82e52i)T^{2} \)
71 \( 1 - 2.70e26iT - 4.85e53T^{2} \)
73 \( 1 + (7.47e26 + 4.31e26i)T + (5.43e53 + 9.41e53i)T^{2} \)
79 \( 1 + (-3.15e27 - 5.46e27i)T + (-5.37e54 + 9.30e54i)T^{2} \)
83 \( 1 + 3.84e27T + 4.50e55T^{2} \)
89 \( 1 + (6.89e26 + 1.19e27i)T + (-1.70e56 + 2.95e56i)T^{2} \)
97 \( 1 + 8.51e28iT - 4.13e57T^{2} \)
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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

−12.02801837370654362735547146821, −11.52997454233688505725834219946, −10.31723326374535789056386914394, −8.284447879534152530609614910453, −6.75886484307728521175245022935, −5.32817439525325940975334678182, −4.46439290293061011723641773898, −3.87892461538673739930397527294, −1.72272317229033832477878858046, −1.12588831668027246529757245899, 0.33632053924849219718150089491, 2.61779350531152280337266602838, 3.78945958251297748086205926070, 4.84361829846539339809768492137, 5.89711683433110944049165215398, 6.72928029423929405188937878861, 7.88209128843179784361124237572, 10.07458909335536643998451880095, 11.67123996145306732198789872160, 11.88736769337151203016379403006

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