Cremona's table of elliptic curves

31020 = 2² · 3 · 5 · 11 · 47

Class	r	Atkin-Lehner	Eigenvalues
31020a (2 curves)	0	2- 3+ 5+ 11+ 47+	2- 3+ 5+ -2 11+  4 -6  0
Curve Equation t 31020a1 [0,-1,0,-231841,78961330] 2 31020a2 [0,-1,0,-4514716,3691994680] 2
31020b (2 curves)	1	2- 3+ 5+ 11- 47+	2- 3+ 5+  0 11-  6 -4 -8
Curve Equation t Generators 31020b1 [0,-1,0,219,450] 2 [186:2538:1] 31020b2 [0,-1,0,-956,4680] 2 [1498:20169:8]
31020c (1 curve)	1	2- 3+ 5+ 11- 47+	2- 3+ 5+  2 11- -1  0  6
Curve Equation t Generators 31020c1 [0,-1,0,-181,-1439] 1 [64:495:1]
31020d (2 curves)	1	2- 3+ 5+ 11- 47+	2- 3+ 5+ -4 11-  2  0  0
Curve Equation t Generators 31020d1 [0,-1,0,-1199901,540748026] 2 [43494:29808810:1331] 31020d2 [0,-1,0,-19559276,33301216776] 2 [5667035535:53020800514:2460375]
31020e (2 curves)	0	2- 3+ 5+ 11- 47-	2- 3+ 5+ -2 11- -4  6  4
Curve Equation t 31020e1 [0,-1,0,-31721,-2164854] 2 31020e2 [0,-1,0,-507596,-139026504] 2
31020f (2 curves)	1	2- 3+ 5- 11+ 47+	2- 3+ 5-  4 11+ -2  0  0
Curve Equation t Generators 31020f1 [0,-1,0,-45,-450] 2 [15:45:1] 31020f2 [0,-1,0,-1220,-15960] 2 [62:378:1]
31020g (1 curve)	0	2- 3+ 5- 11+ 47-	2- 3+ 5- -1 11+  2 -2  4
Curve Equation t 31020g1 [0,-1,0,-3565,-92663] 1
31020h (1 curve)	0	2- 3+ 5- 11- 47+	2- 3+ 5-  1 11-  3  7  5
Curve Equation t 31020h1 [0,-1,0,-3345244380,193797916786872] 1
31020i (2 curves)	0	2- 3+ 5- 11- 47+	2- 3+ 5- -4 11- -2  2  0
Curve Equation t 31020i1 [0,-1,0,-65,-138] 2 31020i2 [0,-1,0,-340,2392] 2
31020j (4 curves)	0	2- 3- 5+ 11- 47+	2- 3- 5+ -4 11-  2  6  8
Curve Equation t 31020j1 [0,1,0,-2641,24584] 6 31020j2 [0,1,0,-35916,2606724] 6 31020j3 [0,1,0,-104281,-12995500] 2 31020j4 [0,1,0,-111156,-11191500] 2
31020k (2 curves)	2	2- 3- 5+ 11- 47+	2- 3- 5+ -4 11- -2 -4 -4
Curve Equation t Generators 31020k1 [0,1,0,-56661,5309964] 2 [-33:-2673:1]&[-231:2475:1] 31020k2 [0,1,0,-913236,335605284] 2 [4650:-9801:8]&[-780:23958:1]
31020l (2 curves)	1	2- 3- 5- 11+ 47-	2- 3- 5- -1 11+  5 -3 -7
Curve Equation t Generators 31020l1 [0,1,0,27140,289508] 3 [196:3630:1] 31020l2 [0,1,0,-339460,-84412012] 1 [386029:10629366:343]
31020m (2 curves)	1	2- 3- 5- 11- 47+	2- 3- 5-  2 11- -6  0 -2
Curve Equation t Generators 31020m1 [0,1,0,6075,0] 2 [540:-12690:1] 31020m2 [0,1,0,-24300,-24300] 2 [-45:990:1]
31020n (2 curves)	0	2- 3- 5- 11- 47-	2- 3- 5-  0 11- -2  2  4
Curve Equation t 31020n1 [0,1,0,-11505,464628] 2 31020n2 [0,1,0,-183380,30164628] 2

Data from Elliptic Curve Data by J. E. Cremona.
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