Cremona's table of elliptic curves

21390 = 2 · 3 · 5 · 23 · 31

Class	r	Atkin-Lehner	Eigenvalues
21390a (2 curves)	2	2+ 3+ 5+ 23+ 31-	2+ 3+ 5+  0 -4 -4  0 -2
Curve Equation t Generators 21390a1 [1,1,0,-48,48] 2 [-4:16:1]&[1:1:1] 21390a2 [1,1,0,-668,6372] 2 [-19:122:1]&[-14:122:1]
21390b (2 curves)	1	2+ 3+ 5- 23- 31+	2+ 3+ 5-  2  0  2 -4  2
Curve Equation t Generators 21390b1 [1,1,0,-57,1701] 2 [2:39:1] 21390b2 [1,1,0,-2537,47829] 2 [-2:231:1]
21390c (1 curve)	2	2+ 3+ 5- 23- 31-	2+ 3+ 5- -4 -4 -1 -2 -7
Curve Equation t Generators 21390c1 [1,1,0,-127,649] 1 [-5:37:1]&[-2:31:1]
21390d (2 curves)	1	2+ 3- 5+ 23+ 31-	2+ 3- 5+ -2  4 -6  4 -6
Curve Equation t Generators 21390d1 [1,0,1,-554,-8548] 2 [60:388:1] 21390d2 [1,0,1,-10474,-413284] 2 [-59:41:1]
21390e (4 curves)	0	2+ 3- 5- 23+ 31-	2+ 3- 5-  2  0  2  0  2
Curve Equation t 21390e1 [1,0,1,2915842,-5621164432] 6 21390e2 [1,0,1,-35216638,-72520787344] 6 21390e3 [1,0,1,-173307533,-879151136632] 2 21390e4 [1,0,1,-2773776013,-56228562452344] 2
21390f (2 curves)	1	2+ 3- 5- 23- 31-	2+ 3- 5- -2  2 -2 -2  4
Curve Equation t Generators 21390f1 [1,0,1,1282,9308] 2 [24:220:1] 21390f2 [1,0,1,-5848,77756] 2 [-80:227:1]
21390g (2 curves)	1	2+ 3- 5- 23- 31-	2+ 3- 5-  4  2  2 -6 -6
Curve Equation t Generators 21390g1 [1,0,1,78072,-30853802] 2 [329:5355:1] 21390g2 [1,0,1,-1127208,-424257194] 2 [-610:6342:1]
21390h (1 curve)	1	2+ 3- 5- 23- 31-	2+ 3- 5-  4 -4 -5 -2  1
Curve Equation t Generators 21390h1 [1,0,1,-136583,-19524022] 1 [2247:103852:1]
21390i (2 curves)	0	2- 3+ 5+ 23- 31-	2- 3+ 5+ -2  2 -6  4 -4
Curve Equation t 21390i1 [1,1,1,-9811,-1546867] 2 21390i2 [1,1,1,-269281,-53752231] 2
21390j (1 curve)	1	2- 3+ 5- 23+ 31+	2- 3+ 5-  0  0 -1 -6  3
Curve Equation t Generators 21390j1 [1,1,1,80,17] 1 [5:21:1]
21390k (4 curves)	0	2- 3+ 5- 23+ 31-	2- 3+ 5-  4 -4  2  2  4
Curve Equation t 21390k1 [1,1,1,-81840,9038865] 4 21390k2 [1,1,1,-1311920,577827857] 4 21390k3 [1,1,1,-1314400,575530385] 2 21390k4 [1,1,1,-20990720,37007222417] 2
21390l (6 curves)	0	2- 3+ 5- 23- 31+	2- 3+ 5-  0 -4 -2 -6 -4
Curve Equation t 21390l1 [1,1,1,-5130,139287] 4 21390l2 [1,1,1,-5210,134615] 8 21390l3 [1,1,1,4090,573575] 4 21390l4 [1,1,1,-15790,-601753] 4 21390l5 [1,1,1,35960,-3665353] 2 21390l6 [1,1,1,-236820,-44454105] 2
21390m (2 curves)	0	2- 3+ 5- 23- 31+	2- 3+ 5-  2  2  2  0  8
Curve Equation t 21390m1 [1,1,1,-1910,32015] 2 21390m2 [1,1,1,-30740,2061647] 2
21390n (2 curves)	1	2- 3+ 5- 23- 31-	2- 3+ 5- -2  2  6 -2 -4
Curve Equation t Generators 21390n1 [1,1,1,-7535,256565] 2 [23:298:1] 21390n2 [1,1,1,-121615,16273397] 2 [167:726:1]
21390o (2 curves)	0	2- 3- 5+ 23+ 31-	2- 3- 5+ -2  0  4  2  4
Curve Equation t 21390o1 [1,0,0,124,0] 2 21390o2 [1,0,0,-496,-124] 2
21390p (2 curves)	1	2- 3- 5+ 23- 31-	2- 3- 5+ -4 -4  4  4 -6
Curve Equation t Generators 21390p1 [1,0,0,-15821,2961] 2 [-62:895:1] 21390p2 [1,0,0,-174541,27969425] 2 [-214:7559:1]
21390q (4 curves)	0	2- 3- 5- 23+ 31+	2- 3- 5-  4  0 -2  6  4
Curve Equation t 21390q1 [1,0,0,8440,-139200] 4 21390q2 [1,0,0,-37640,-1180608] 4 21390q3 [1,0,0,-313640,66770592] 2 21390q4 [1,0,0,-498920,-135597600] 2
21390r (4 curves)	0	2- 3- 5- 23+ 31+	2- 3- 5-  4 -4  2 -6 -4
Curve Equation t 21390r1 [1,0,0,-354650,77315940] 2 21390r2 [1,0,0,-5597530,5096849252] 4 21390r3 [1,0,0,-5520730,5243521892] 2 21390r4 [1,0,0,-89560410,326221280100] 4
21390s (4 curves)	1	2- 3- 5- 23+ 31-	2- 3- 5- -4 -6  2  6  2
Curve Equation t Generators 21390s1 [1,0,0,5255,126137] 6 [-16:203:1] 21390s2 [1,0,0,-28225,1150625] 6 [-8:1177:1] 21390s3 [1,0,0,-53245,-6702163] 2 [494:9113:1] 21390s4 [1,0,0,-946975,-354720625] 2 [285450:5581175:216]

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