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
Conductor	21420	Conductor
Count	4	Number of curves in isogeny class
Curves	21420d1 21420d2 21420d3 21420d4	Curves in isogeny class
deg	69120	Modular degree for the optimal curve
Eigenvalues	2- 3+ 5+ 7-  6  2 17-  2	Hecke eigenvalues for primes less than 20
L	2.7281298925681	L(r)(E,1)/r!
r	0	Rank of the group of rational points
Twists	85680cr 21420h 107100b	Quadratic twists by: -4 -3 5

Hecke Eigenvalues for isogeny class 21420d

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
-	+	+	-	6	2	-	2	-6	6	-4	-10	6	8	0	0	12	8	8	-6	-4	8	12	-6	8

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Quadratic twists for isogeny class 21420d

-4	-3	5
85680cr	21420h	107100b

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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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