Cremona's table of elliptic curves

21420 = 2² · 3² · 5 · 7 · 17

Field	Data	Notes
Atkin-Lehner	2- 3+ 5+ 7+ 17-	Signs for the Atkin-Lehner involutions
Class	21420a	Isogeny class
Conductor	21420	Conductor
∏ cp	8	Product of Tamagawa factors cp
deg	13824	Modular degree for the optimal curve
Δ	15927483600 = 24 · 39 · 52 · 7 · 172	Discriminant
Eigenvalues	2- 3+ 5+ 7+  2  2 17- -2	Hecke eigenvalues for primes up to 20
Equation	[0,0,0,-1728,26973]	[a1,a2,a3,a4,a6]
Generators	[-41:170:1]	Generators of the group modulo torsion
j	1811939328/50575	j-invariant
L	4.9174160667256	L(r)(E,1)/r!
Ω	1.2354528476882	Real period
R	1.9901269708217	Regulator
r	1	Rank of the group of rational points
S	1	(Analytic) order of Ш
t	2	Number of elements in the torsion subgroup
Twists	85680cv1 21420e1 107100f1	Quadratic twists by: -4 -3 5

Hecke Eigenvalues for elliptic curve 21420a1

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	-	-2	6	-2	4	-2	-10	-8	-8	-8	12	8	-8	6	4	-16	4	-14	16

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Quadratic twists for elliptic curve 21420a1

-4	-3	5
85680cv1	21420e1	107100f1

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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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