Cremona's table of elliptic curves

21855 = 3 · 5 · 31 · 47

Class	r	Atkin-Lehner	Eigenvalues
21855a (1 curve)	0	3+ 5+ 31- 47+	-1 3+ 5+ -1  6  5 -3  1
Curve Equation t 21855a1 [1,1,1,23984,6765938] 1
21855b (1 curve)	2	3+ 5- 31+ 47+	0 3+ 5- -4 -4 -1 -4  0
Curve Equation t Generators 21855b1 [0,-1,1,-115,1818] 1 [-8:46:1]&[4:37:1]
21855c (1 curve)	1	3- 5- 31+ 47+	-1 3- 5-  5  2 -1 -3 -7
Curve Equation t Generators 21855c1 [1,0,0,-12407900,16845800625] 1 [2475:34800:1]
21855d (1 curve)	0	3- 5- 31+ 47-	1 3- 5-  3 -2 -4 -6  3
Curve Equation t 21855d1 [1,0,1,-5793,-170267] 1
21855e (1 curve)	2	3- 5- 31+ 47-	-1 3- 5- -1 -4 -7 -3 -1
Curve Equation t Generators 21855e1 [1,0,0,88065,5171850] 1 [-45:1080:1]&[-9:2097:1]

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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