Cremona's table of elliptic curves

1995 = 3 · 5 · 7 · 19

Field	Data	Notes
Atkin-Lehner	3+ 5- 7+ 19+	Signs for the Atkin-Lehner involutions
Class	1995c	Isogeny class
Conductor	1995	Conductor
∏ cp	2	Product of Tamagawa factors cp
Δ	9975 = 3 · 52 · 7 · 19	Discriminant
Eigenvalues	-1 3+ 5- 7+  4 -2  2 19+	Hecke eigenvalues for primes up to 20
Equation	[1,1,1,-53200,4700810]	[a1,a2,a3,a4,a6]
j	16651720753282540801/9975	j-invariant
L	0.87682864642683	L(r)(E,1)/r!
Ω	1.7536572928537	Real period
R	1	Regulator
r	0	Rank of the group of rational points
S	4	(Analytic) order of Ш
t	4	Number of elements in the torsion subgroup
Twists	31920ce4 127680ci4 5985h3 9975o4	Quadratic twists by: -4 8 -3 5

Hecke Eigenvalues for elliptic curve 1995c4

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
-1	+	-	+	4	-2	2	+	8	-2	-8	-2	-6	12	0	6	-4	-2	-4	0	2	0	-12	10	2

---

Quadratic twists for elliptic curve 1995c4

-4	8	-3	5	-7	-19
31920ce4	127680ci4	5985h3	9975o4	13965s3	37905t4

---

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

Part of Computational Number Theory
Back to Tables and computations