Cremona's table of elliptic curves

30303 = 3² · 7 · 13 · 37

Class	r	Atkin-Lehner	Eigenvalues
30303a (1 curve)	1	3+ 7+ 13+ 37+	0 3+  1 7+  3 13+  6 -8
Curve Equation t Generators 30303a1 [0,0,1,-12,-7] 1 [-3:1:1]
30303b (1 curve)	1	3+ 7+ 13+ 37+	0 3+ -1 7+ -3 13+ -6 -8
Curve Equation t Generators 30303b1 [0,0,1,-108,182] 1 [0:13:1]
30303c (2 curves)	0	3+ 7+ 13- 37+	1 3+ -4 7+  6 13- -4  4
Curve Equation t 30303c1 [1,-1,0,-624,-3501] 2 30303c2 [1,-1,0,1911,-26316] 2
30303d (2 curves)	0	3+ 7+ 13- 37+	-1 3+  4 7+ -6 13-  4  4
Curve Equation t 30303d1 [1,-1,1,-5618,100144] 2 30303d2 [1,-1,1,17197,693334] 2
30303e (1 curve)	0	3+ 7- 13- 37-	2 3+  4 7-  3 13-  3 -5
Curve Equation t 30303e1 [0,0,1,-243,-1789] 1
30303f (1 curve)	2	3+ 7- 13- 37-	-2 3+ -4 7- -3 13- -3 -5
Curve Equation t Generators 30303f1 [0,0,1,-27,66] 1 [3:-4:1]&[-4:10:1]
30303g (1 curve)	1	3- 7+ 13- 37+	-2 3- -1 7+ -3 13-  2 -8
Curve Equation t Generators 30303g1 [0,0,1,-232293,-43082298] 1 [-277:94:1]
30303h (1 curve)	1	3- 7- 13+ 37+	0 3-  1 7- -2 13+  2  5
Curve Equation t Generators 30303h1 [0,0,1,-3072,-67932] 1 [782:21811:1]
30303i (1 curve)	1	3- 7- 13+ 37+	2 3-  3 7- -1 13+  2 -4
Curve Equation t Generators 30303i1 [0,0,1,-1011,9243] 1 [34:563:8]
30303j (1 curve)	2	3- 7- 13- 37+	0 3-  0 7- -5 13- -1 -5
Curve Equation t Generators 30303j1 [0,0,1,1590,19813] 1 [-11:31:1]&[-46:815:8]
30303k (3 curves)	1	3- 7- 13- 37-	0 3- -3 7-  3 13-  0  2
Curve Equation t Generators 30303k1 [0,0,1,-10344,-404793] 1 [-3772:697:64] 30303k2 [0,0,1,-29784,1474812] 3 [-172:1228:1] 30303k3 [0,0,1,-2237574,1288291707] 3 [-505:47848:1]
30303l (4 curves)	1	3- 7- 13- 37-	1 3-  2 7-  0 13- -6  4
Curve Equation t Generators 30303l1 [1,-1,0,-6606,-145233] 2 [3018:17651:27] 30303l2 [1,-1,0,-39411,2905632] 4 [396:6822:1] 30303l3 [1,-1,0,20124,10871415] 2 [558:13707:1] 30303l4 [1,-1,0,-623826,189801549] 4 [37332:295749:64]
30303m (1 curve)	1	3- 7- 13- 37-	-2 3- -1 7- -3 13- -6  4
Curve Equation t Generators 30303m1 [0,0,1,-633,5890] 1 [4:-59:1]

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