Properties

Label 2-240-4.3-c2-0-6
Degree $2$
Conductor $240$
Sign $i$
Analytic cond. $6.53952$
Root an. cond. $2.55724$
Motivic weight $2$
Arithmetic yes
Rational no
Primitive yes
Self-dual no
Analytic rank $0$

Origins

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Normalization:  

Dirichlet series

L(s)  = 1  − 1.73i·3-s + 2.23·5-s − 4.28i·7-s − 2.99·9-s − 11.2i·11-s + 5.41·13-s − 3.87i·15-s − 1.41·17-s − 8.56i·19-s − 7.41·21-s − 24.0i·23-s + 5.00·25-s + 5.19i·27-s − 25.4·29-s − 50.1i·31-s + ⋯
L(s)  = 1  − 0.577i·3-s + 0.447·5-s − 0.611i·7-s − 0.333·9-s − 1.01i·11-s + 0.416·13-s − 0.258i·15-s − 0.0833·17-s − 0.450i·19-s − 0.353·21-s − 1.04i·23-s + 0.200·25-s + 0.192i·27-s − 0.876·29-s − 1.61i·31-s + ⋯

Functional equation

\[\begin{aligned}\Lambda(s)=\mathstrut & 240 ^{s/2} \, \Gamma_{\C}(s) \, L(s)\cr =\mathstrut & i\, \overline{\Lambda}(3-s) \end{aligned}\]
\[\begin{aligned}\Lambda(s)=\mathstrut & 240 ^{s/2} \, \Gamma_{\C}(s+1) \, L(s)\cr =\mathstrut & i\, \overline{\Lambda}(1-s) \end{aligned}\]

Invariants

Degree: \(2\)
Conductor: \(240\)    =    \(2^{4} \cdot 3 \cdot 5\)
Sign: $i$
Analytic conductor: \(6.53952\)
Root analytic conductor: \(2.55724\)
Motivic weight: \(2\)
Rational: no
Arithmetic: yes
Character: $\chi_{240} (31, \cdot )$
Primitive: yes
Self-dual: no
Analytic rank: \(0\)
Selberg data: \((2,\ 240,\ (\ :1),\ i)\)

Particular Values

\(L(\frac{3}{2})\) \(\approx\) \(1.09462 - 1.09462i\)
\(L(\frac12)\) \(\approx\) \(1.09462 - 1.09462i\)
\(L(2)\) not available
\(L(1)\) not available

Euler product

   \(L(s) = \displaystyle \prod_{p} F_p(p^{-s})^{-1} \)
$p$$F_p(T)$
bad2 \( 1 \)
3 \( 1 + 1.73iT \)
5 \( 1 - 2.23T \)
good7 \( 1 + 4.28iT - 49T^{2} \)
11 \( 1 + 11.2iT - 121T^{2} \)
13 \( 1 - 5.41T + 169T^{2} \)
17 \( 1 + 1.41T + 289T^{2} \)
19 \( 1 + 8.56iT - 361T^{2} \)
23 \( 1 + 24.0iT - 529T^{2} \)
29 \( 1 + 25.4T + 841T^{2} \)
31 \( 1 + 50.1iT - 961T^{2} \)
37 \( 1 - 60.2T + 1.36e3T^{2} \)
41 \( 1 + 30T + 1.68e3T^{2} \)
43 \( 1 - 37.9iT - 1.84e3T^{2} \)
47 \( 1 - 39.9iT - 2.20e3T^{2} \)
53 \( 1 + 16.2T + 2.80e3T^{2} \)
59 \( 1 - 81.7iT - 3.48e3T^{2} \)
61 \( 1 - 94.4T + 3.72e3T^{2} \)
67 \( 1 - 129. iT - 4.48e3T^{2} \)
71 \( 1 + 102. iT - 5.04e3T^{2} \)
73 \( 1 - 24.8T + 5.32e3T^{2} \)
79 \( 1 - 91.7iT - 6.24e3T^{2} \)
83 \( 1 - 88.0iT - 6.88e3T^{2} \)
89 \( 1 + 20.8T + 7.92e3T^{2} \)
97 \( 1 + 14T + 9.40e3T^{2} \)
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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

−11.50328640928012969513740952567, −10.89851490351746656181049476025, −9.718628388953054439633031973265, −8.644515978466745917765062884235, −7.69382418144301866457884565608, −6.53511652046397327337993089806, −5.70426983897486499443157401130, −4.13303555463671937849870148844, −2.60834843336393715955041397678, −0.859092968332865621591703998275, 1.95610550847262223300549683189, 3.53208496918929497047413446254, 4.92384509019044727649073198166, 5.85049570954715614686803995000, 7.10882758471019661522553600375, 8.415162715502546197641717428944, 9.388332930598228828812567627812, 10.07419371826540934968148116668, 11.14121732527518704501894494978, 12.11465377786315986319264747588

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