Cremona's table of elliptic curves

21689 = 23² · 41

Class	r	Atkin-Lehner	Eigenvalues
21689a (2 curves)	1	23- 41-	1  0  2 -2 -2  6 -8  2
Curve Equation t Generators 21689a1 [1,-1,0,-6976,-250341] 2 [342097210:6977364367:753571] 21689a2 [1,-1,0,-115421,-15063928] 2 [17803042842362414:262946583594855623:34575881164552]
21689b (2 curves)	1	23- 41-	-1 -2  0  0  4  2 -6  4
Curve Equation t Generators 21689b1 [1,0,0,6337,-364496] 2 [76650600:-736184203:1124864] 21689b2 [1,0,0,-54498,-4124099] 2 [22068:261329:64]
21689c (2 curves)	1	23- 41-	-1 -2  0  0 -4  2  6 -4
Curve Equation t Generators 21689c1 [1,0,0,12,31] 2 [2:7:1] 21689c2 [1,0,0,-103,330] 2 [-2:24:1]

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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