Base field \(\Q(\sqrt{-951}) \)
Generator \(a\), with minimal polynomial \( x^{2} - x + 238 \); class number \(26\).
Weierstrass equation
This is not a global minimal model: it is minimal at all primes except \((29,a+18)\). No global minimal model exists.
Mordell-Weil group structure
Not computed ($ 0 \le r \le 1 $)
Invariants
| Conductor: | $\frak{N}$ | = | \((28,2a)\) | = | \((2,a)^{2}\cdot(2,a+1)\cdot(7,a)\) |
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| Conductor norm: | $N(\frak{N})$ | = | \( 56 \) | = | \(2^{2}\cdot2\cdot7\) |
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| Discriminant: | $\Delta$ | = | $154697519644a-709496431224$ | ||
| Discriminant ideal: | $(\Delta)$ | = | \((154697519644a-709496431224)\) | = | \((2,a)^{8}\cdot(2,a+1)^{2}\cdot(7,a)^{5}\cdot(29,a+18)^{12}\) |
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| Discriminant norm: | $N(\Delta)$ | = | \( 6089282622806341808217088 \) | = | \(2^{8}\cdot2^{2}\cdot7^{5}\cdot29^{12}\) |
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| Minimal discriminant: | $\frak{D}_{\mathrm{min}}$ | = | \((4302592,4a+1792056)\) | = | \((2,a)^{8}\cdot(2,a+1)^{2}\cdot(7,a)^{5}\) |
| Minimal discriminant norm: | $N(\frak{D}_{\mathrm{min}})$ | = | \( 17210368 \) | = | \(2^{8}\cdot2^{2}\cdot7^{5}\) |
| j-invariant: | $j$ | = | \( -\frac{498679}{67228} a + \frac{4371167}{33614} \) | ||
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| Endomorphism ring: | $\mathrm{End}(E)$ | = | \(\Z\) | ||
| Geometric endomorphism ring: | $\mathrm{End}(E_{\overline{\Q}})$ | = | \(\Z\) (no potential complex multiplication) | ||
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| Sato-Tate group: | $\mathrm{ST}(E)$ | = | $\mathrm{SU}(2)$ | ||
BSD invariants
| Analytic rank: | $r_{\mathrm{an}}$ | = | \( 1 \) |
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| Mordell-Weil rank: | $r?$ | \(0 \le r \le 1\) | |
| Regulator: | $\mathrm{Reg}(E/K)$ | ≈ | not available |
| Néron-Tate Regulator: | $\mathrm{Reg}_{\mathrm{NT}}(E/K)$ | ≈ | not available |
| Global period: | $\Omega(E/K)$ | ≈ | \( 13.921751325762468784182882847760227659 \) |
| Tamagawa product: | $\prod_{\frak{p}}c_{\frak{p}}$ | = | \( 6 \) = \(3\cdot2\cdot1\cdot1\) |
| Torsion order: | $\#E(K)_{\mathrm{tor}}$ | = | \(1\) |
| Special value: | $L^{(r)}(E/K,1)/r!$ | ≈ | \( 14.020738775416265808304437491362614920 \) |
| Analytic order of Ш: | Ш${}_{\mathrm{an}}$ | = | not available |
Local data at primes of bad reduction
This elliptic curve is not semistable. There are 3 primes $\frak{p}$ of bad reduction. Primes of good reduction for the curve but which divide the discriminant of the model above (if any) are included.
| $\mathfrak{p}$ | $N(\mathfrak{p})$ | Tamagawa number | Kodaira symbol | Reduction type | Root number | \(\mathrm{ord}_{\mathfrak{p}}(\mathfrak{N}\)) | \(\mathrm{ord}_{\mathfrak{p}}(\mathfrak{D}_{\mathrm{min}}\)) | \(\mathrm{ord}_{\mathfrak{p}}(\mathrm{den}(j))\) |
|---|---|---|---|---|---|---|---|---|
| \((2,a)\) | \(2\) | \(3\) | \(IV^{*}\) | Additive | \(-1\) | \(2\) | \(8\) | \(0\) |
| \((2,a+1)\) | \(2\) | \(2\) | \(I_{2}\) | Split multiplicative | \(-1\) | \(1\) | \(2\) | \(2\) |
| \((7,a)\) | \(7\) | \(1\) | \(I_{5}\) | Non-split multiplicative | \(1\) | \(1\) | \(5\) | \(5\) |
| \((29,a+18)\) | \(29\) | \(1\) | \(I_0\) | Good | \(1\) | \(0\) | \(0\) | \(0\) |
Galois Representations
The mod \( p \) Galois Representation has maximal image for all primes \( p < 1000 \) .
Isogenies and isogeny class
This curve has no rational isogenies. Its isogeny class 56.3-b consists of this curve only.
Base change
This elliptic curve is not a \(\Q\)-curve.
It is not the base change of an elliptic curve defined over any subfield.