Label |
Class |
Class size |
Class degree |
Base field |
Field degree |
Field signature |
Conductor |
Conductor norm |
Discriminant norm |
Root analytic conductor |
Bad primes |
Rank |
Torsion |
CM |
CM |
Sato-Tate |
$\Q$-curve |
Base change |
Semistable |
Potentially good |
Nonmax $\ell$ |
mod-$\ell$ images |
$Ш_{\textrm{an}}$ |
Tamagawa |
Regulator |
Period |
Leading coeff |
j-invariant |
Weierstrass coefficients |
Weierstrass equation |
32.4-a1 |
32.4-a |
$1$ |
$1$ |
\(\Q(\sqrt{-31}) \) |
$2$ |
$[0, 1]$ |
32.4 |
\( 2^{5} \) |
\( 2^{20} \) |
$1.18333$ |
$(2,a), (2,a+1)$ |
$1$ |
$\mathsf{trivial}$ |
$\textsf{no}$ |
|
$\mathrm{SU}(2)$ |
|
|
|
✓ |
$2, 5$ |
2Cn, 5S4 |
$1$ |
\( 2 \) |
$0.139158379$ |
$8.191609121$ |
1.637901283 |
\( -1536 a + 2816 \) |
\( \bigl[0\) , \( -1\) , \( 0\) , \( a + 2\) , \( -3\bigr] \) |
${y}^2={x}^3-{x}^2+\left(a+2\right){x}-3$ |
256.5-b1 |
256.5-b |
$1$ |
$1$ |
\(\Q(\sqrt{-31}) \) |
$2$ |
$[0, 1]$ |
256.5 |
\( 2^{8} \) |
\( 2^{20} \) |
$1.99012$ |
$(2,a), (2,a+1)$ |
0 |
$\mathsf{trivial}$ |
$\textsf{no}$ |
|
$\mathrm{SU}(2)$ |
|
|
|
✓ |
$2, 5$ |
2Cn, 5S4 |
$1$ |
\( 1 \) |
$1$ |
$8.191609121$ |
2.942512860 |
\( -1536 a + 2816 \) |
\( \bigl[0\) , \( 1\) , \( 0\) , \( a + 2\) , \( 3\bigr] \) |
${y}^2={x}^3+{x}^2+\left(a+2\right){x}+3$ |
256.7-a1 |
256.7-a |
$1$ |
$1$ |
\(\Q(\sqrt{-31}) \) |
$2$ |
$[0, 1]$ |
256.7 |
\( 2^{8} \) |
\( 2^{26} \) |
$1.99012$ |
$(2,a), (2,a+1)$ |
0 |
$\mathsf{trivial}$ |
$\textsf{no}$ |
|
$\mathrm{SU}(2)$ |
|
|
|
✓ |
$2, 5$ |
2Cn, 5S4 |
$1$ |
\( 1 \) |
$1$ |
$5.792342358$ |
2.080670797 |
\( -1536 a + 2816 \) |
\( \bigl[0\) , \( a\) , \( 0\) , \( -a - 8\) , \( -a + 8\bigr] \) |
${y}^2={x}^3+a{x}^2+\left(-a-8\right){x}-a+8$ |
512.4-c1 |
512.4-c |
$1$ |
$1$ |
\(\Q(\sqrt{-31}) \) |
$2$ |
$[0, 1]$ |
512.4 |
\( 2^{9} \) |
\( 2^{14} \) |
$2.36667$ |
$(2,a), (2,a+1)$ |
0 |
$\mathsf{trivial}$ |
$\textsf{no}$ |
|
$\mathrm{SU}(2)$ |
|
|
|
✓ |
$2, 5$ |
2Cn, 5S4 |
$1$ |
\( 2 \) |
$1$ |
$5.792342358$ |
4.161341595 |
\( -1536 a + 2816 \) |
\( \bigl[0\) , \( -a\) , \( 0\) , \( -4\) , \( a\bigr] \) |
${y}^2={x}^3-a{x}^2-4{x}+a$ |
800.10-a1 |
800.10-a |
$1$ |
$1$ |
\(\Q(\sqrt{-31}) \) |
$2$ |
$[0, 1]$ |
800.10 |
\( 2^{5} \cdot 5^{2} \) |
\( 2^{8} \cdot 5^{6} \) |
$2.64601$ |
$(2,a), (2,a+1), (5,a+1)$ |
0 |
$\mathsf{trivial}$ |
$\textsf{no}$ |
|
$\mathrm{SU}(2)$ |
|
|
|
✓ |
$2, 5$ |
2Cn, 5S4 |
$1$ |
\( 2 \) |
$1$ |
$3.663398968$ |
2.631863512 |
\( -1536 a + 2816 \) |
\( \bigl[0\) , \( -a + 1\) , \( 0\) , \( -a + 2\) , \( -2 a - 3\bigr] \) |
${y}^2={x}^3+\left(-a+1\right){x}^2+\left(-a+2\right){x}-2a-3$ |
800.12-a1 |
800.12-a |
$1$ |
$1$ |
\(\Q(\sqrt{-31}) \) |
$2$ |
$[0, 1]$ |
800.12 |
\( 2^{5} \cdot 5^{2} \) |
\( 2^{20} \cdot 5^{6} \) |
$2.64601$ |
$(2,a), (2,a+1), (5,a+3)$ |
$1$ |
$\mathsf{trivial}$ |
$\textsf{no}$ |
|
$\mathrm{SU}(2)$ |
|
|
|
✓ |
$2, 5$ |
2Cn, 5S4 |
$1$ |
\( 2 \cdot 3 \) |
$0.200541970$ |
$3.663398968$ |
3.166794570 |
\( -1536 a + 2816 \) |
\( \bigl[0\) , \( -a + 1\) , \( 0\) , \( 6 a - 5\) , \( -4 a - 5\bigr] \) |
${y}^2={x}^3+\left(-a+1\right){x}^2+\left(6a-5\right){x}-4a-5$ |
1024.5-f1 |
1024.5-f |
$1$ |
$1$ |
\(\Q(\sqrt{-31}) \) |
$2$ |
$[0, 1]$ |
1024.5 |
\( 2^{10} \) |
\( 2^{14} \) |
$2.81446$ |
$(2,a), (2,a+1)$ |
0 |
$\mathsf{trivial}$ |
$\textsf{no}$ |
|
$\mathrm{SU}(2)$ |
|
|
|
✓ |
$2, 5$ |
2Cn, 5S4 |
$1$ |
\( 1 \) |
$1$ |
$5.792342358$ |
2.080670797 |
\( -1536 a + 2816 \) |
\( \bigl[0\) , \( a\) , \( 0\) , \( -4\) , \( -a\bigr] \) |
${y}^2={x}^3+a{x}^2-4{x}-a$ |
1024.7-a1 |
1024.7-a |
$1$ |
$1$ |
\(\Q(\sqrt{-31}) \) |
$2$ |
$[0, 1]$ |
1024.7 |
\( 2^{10} \) |
\( 2^{26} \) |
$2.81446$ |
$(2,a), (2,a+1)$ |
$1$ |
$\mathsf{trivial}$ |
$\textsf{no}$ |
|
$\mathrm{SU}(2)$ |
|
|
|
✓ |
$2, 5$ |
2Cn, 5S4 |
$1$ |
\( 1 \) |
$0.370974314$ |
$5.792342358$ |
1.543750847 |
\( -1536 a + 2816 \) |
\( \bigl[0\) , \( -a\) , \( 0\) , \( -a - 8\) , \( a - 8\bigr] \) |
${y}^2={x}^3-a{x}^2+\left(-a-8\right){x}+a-8$ |
2592.4-a1 |
2592.4-a |
$1$ |
$1$ |
\(\Q(\sqrt{-31}) \) |
$2$ |
$[0, 1]$ |
2592.4 |
\( 2^{5} \cdot 3^{4} \) |
\( 2^{20} \cdot 3^{12} \) |
$3.55000$ |
$(2,a), (2,a+1), (3)$ |
$2$ |
$\mathsf{trivial}$ |
$\textsf{no}$ |
|
$\mathrm{SU}(2)$ |
|
|
|
✓ |
$2, 5$ |
2Cn, 5S4 |
$1$ |
\( 2^{3} \cdot 3 \) |
$0.059386400$ |
$2.730536373$ |
5.591847865 |
\( -1536 a + 2816 \) |
\( \bigl[0\) , \( 0\) , \( 0\) , \( 9 a + 15\) , \( -9 a + 65\bigr] \) |
${y}^2={x}^3+\left(9a+15\right){x}-9a+65$ |
3136.13-b1 |
3136.13-b |
$1$ |
$1$ |
\(\Q(\sqrt{-31}) \) |
$2$ |
$[0, 1]$ |
3136.13 |
\( 2^{6} \cdot 7^{2} \) |
\( 2^{20} \cdot 7^{6} \) |
$3.72317$ |
$(2,a), (2,a+1), (7,a+2)$ |
$1$ |
$\mathsf{trivial}$ |
$\textsf{no}$ |
|
$\mathrm{SU}(2)$ |
|
|
|
✓ |
$2, 5$ |
2Cn, 5S4 |
$1$ |
\( 3 \) |
$0.852028587$ |
$3.096137224$ |
5.685579897 |
\( -1536 a + 2816 \) |
\( \bigl[0\) , \( -1\) , \( 0\) , \( -7 a + 19\) , \( 2 a - 51\bigr] \) |
${y}^2={x}^3-{x}^2+\left(-7a+19\right){x}+2a-51$ |
3136.15-a1 |
3136.15-a |
$1$ |
$1$ |
\(\Q(\sqrt{-31}) \) |
$2$ |
$[0, 1]$ |
3136.15 |
\( 2^{6} \cdot 7^{2} \) |
\( 2^{8} \cdot 7^{6} \) |
$3.72317$ |
$(2,a), (2,a+1), (7,a+4)$ |
$1$ |
$\mathsf{trivial}$ |
$\textsf{no}$ |
|
$\mathrm{SU}(2)$ |
|
|
|
✓ |
$2, 5$ |
2Cn, 5S4 |
$1$ |
\( 3 \) |
$0.555237745$ |
$3.096137224$ |
3.705097000 |
\( -1536 a + 2816 \) |
\( \bigl[0\) , \( a + 1\) , \( 0\) , \( 3 a - 6\) , \( 2 a - 7\bigr] \) |
${y}^2={x}^3+\left(a+1\right){x}^2+\left(3a-6\right){x}+2a-7$ |
4096.7-c1 |
4096.7-c |
$1$ |
$1$ |
\(\Q(\sqrt{-31}) \) |
$2$ |
$[0, 1]$ |
4096.7 |
\( 2^{12} \) |
\( 2^{32} \) |
$3.98024$ |
$(2,a), (2,a+1)$ |
$1$ |
$\mathsf{trivial}$ |
$\textsf{no}$ |
|
$\mathrm{SU}(2)$ |
|
|
|
✓ |
$2, 5$ |
2Cn, 5S4 |
$1$ |
\( 1 \) |
$0.659464960$ |
$4.095804560$ |
1.940484126 |
\( -1536 a + 2816 \) |
\( \bigl[0\) , \( 1\) , \( 0\) , \( 4 a + 7\) , \( 4 a - 17\bigr] \) |
${y}^2={x}^3+{x}^2+\left(4a+7\right){x}+4a-17$ |
4096.7-d1 |
4096.7-d |
$1$ |
$1$ |
\(\Q(\sqrt{-31}) \) |
$2$ |
$[0, 1]$ |
4096.7 |
\( 2^{12} \) |
\( 2^{32} \) |
$3.98024$ |
$(2,a), (2,a+1)$ |
$1$ |
$\mathsf{trivial}$ |
$\textsf{no}$ |
|
$\mathrm{SU}(2)$ |
|
|
|
✓ |
$2, 5$ |
2Cn, 5S4 |
$1$ |
\( 1 \) |
$2.155455004$ |
$4.095804560$ |
6.342454071 |
\( -1536 a + 2816 \) |
\( \bigl[0\) , \( -1\) , \( 0\) , \( 4 a + 7\) , \( -4 a + 17\bigr] \) |
${y}^2={x}^3-{x}^2+\left(4a+7\right){x}-4a+17$ |
*The rank, regulator and analytic order of Ш are
not known for all curves in the database; curves for which these are
unknown will not appear in searches specifying one of these
quantities.