Cremona's table of elliptic curves

21930 = 2 · 3 · 5 · 17 · 43

Field	Data	Notes
Atkin-Lehner	2+ 3+ 5+ 17+ 43-	Signs for the Atkin-Lehner involutions
Class	21930a	Isogeny class
Conductor	21930	Conductor
∏ cp	32	Product of Tamagawa factors cp
Δ	1.4248369526752E+21	Discriminant
Eigenvalues	2+ 3+ 5+  0 -4 -2 17+  0	Hecke eigenvalues for primes up to 20
Equation	[1,1,0,-4229798,2811251652]	[a1,a2,a3,a4,a6]
j	8369177043498476846301289/1424836952675156250000	j-invariant
L	0.28932660006676	L(r)(E,1)/r!
Ω	0.14466330003338	Real period
R	1	Regulator
r	0	Rank of the group of rational points
S	1	(Analytic) order of Ш
t	4	Number of elements in the torsion subgroup
Twists	65790cv2 109650cv2	Quadratic twists by: -3 5

Hecke Eigenvalues for elliptic curve 21930a2

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
+	+	+	0	-4	-2	+	0	-4	2	0	-6	2	-	12	-6	4	6	-4	-16	6	0	0	-10	-14

---

Quadratic twists for elliptic curve 21930a2

-3	5
65790cv2	109650cv2

---

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