Cremona's table of elliptic curves

400 = 2⁴ · 5²

Field	Data	Notes
Atkin-Lehner	2+ 5-	Signs for the Atkin-Lehner involutions
Class	400d	Isogeny class
Conductor	400	Conductor
∏ cp	4	Product of Tamagawa factors cp
Δ	32000 = 28 · 53	Discriminant
Eigenvalues	2+  2 5-  2  4 -4  0  4	Hecke eigenvalues for primes up to 20
Equation	[0,-1,0,-28,-48]	[a1,a2,a3,a4,a6]
j	78608	j-invariant
L	2.0709009523614	L(r)(E,1)/r!
Ω	2.0709009523614	Real period
R	1	Regulator
r	0	Rank of the group of rational points
S	1	(Analytic) order of Ш
t	2	Number of elements in the torsion subgroup
Twists	200b2 1600x2 3600s2 400f2	Quadratic twists by: -4 8 -3 5

Hecke Eigenvalues for elliptic curve 400d2

a2	a3	a5	a7	a11	a13	a17	a19	a23	a29	a31	a37	a41	a43	a47	a53	a59	a61	a67	a71	a73	a79	a83	a89	a97
+	2	-	2	4	-4	0	4	-2	2	0	-4	2	-6	-6	4	12	-10	14	-8	-8	-16	2	6	-16

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Quadratic twists for elliptic curve 400d2

-4	8	-3	5	-7	-11	13	17
200b2	1600x2	3600s2	400f2	19600bo2	48400ba2	67600y2	115600y2

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Data from Elliptic Curve Data by J. E. Cremona.
Design inspired by The Modular Forms Explorer by William Stein.

Part of Computational Number Theory
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