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Label Class Base field Conductor norm Rank Torsion CM Sato-Tate Regulator Period Leading coeff j-invariant Weierstrass coefficients Weierstrass equation
4.1-a1 4.1-a 5.5.81509.1 \( 2^{2} \) 0 $\Z/2\Z$ $\mathrm{SU}(2)$ $1$ $447.2294659$ 1.17486750 \( 358762499 a^{4} - 839089725 a^{3} - 643809485 a^{2} + 1835732071 a - 556242878 \) \( \bigl[a\) , \( -a^{4} + 6 a^{2} - 6\) , \( a^{4} - 5 a^{2} - a + 4\) , \( 2 a^{4} - 2 a^{3} - 10 a^{2} + 5 a + 8\) , \( -a^{4} + 3 a^{3} + 4 a^{2} - 3 a - 7\bigr] \) ${y}^2+a{x}{y}+\left(a^{4}-5a^{2}-a+4\right){y}={x}^{3}+\left(-a^{4}+6a^{2}-6\right){x}^{2}+\left(2a^{4}-2a^{3}-10a^{2}+5a+8\right){x}-a^{4}+3a^{3}+4a^{2}-3a-7$
4.1-a2 4.1-a 5.5.81509.1 \( 2^{2} \) 0 $\Z/2\Z$ $\mathrm{SU}(2)$ $1$ $1341.688397$ 1.17486750 \( -1775912 a^{4} - 798213 a^{3} + 7383953 a^{2} + 4527695 a - 2623862 \) \( \bigl[a^{4} - a^{3} - 4 a^{2} + 3 a + 2\) , \( a^{4} - a^{3} - 5 a^{2} + 3 a + 4\) , \( a^{2} + a - 2\) , \( 7 a^{4} - 10 a^{3} - 27 a^{2} + 24 a + 9\) , \( 15 a^{4} - 29 a^{3} - 44 a^{2} + 77 a - 14\bigr] \) ${y}^2+\left(a^{4}-a^{3}-4a^{2}+3a+2\right){x}{y}+\left(a^{2}+a-2\right){y}={x}^{3}+\left(a^{4}-a^{3}-5a^{2}+3a+4\right){x}^{2}+\left(7a^{4}-10a^{3}-27a^{2}+24a+9\right){x}+15a^{4}-29a^{3}-44a^{2}+77a-14$
4.1-a3 4.1-a 5.5.81509.1 \( 2^{2} \) 0 $\Z/2\Z$ $\mathrm{SU}(2)$ $1$ $1341.688397$ 1.17486750 \( 4217846417445 a^{4} + 5349713818023 a^{3} - 8954188463434 a^{2} - 7657692332285 a + 3718877580798 \) \( \bigl[a^{4} - a^{3} - 4 a^{2} + 2 a + 2\) , \( -a^{4} + a^{3} + 4 a^{2} - a - 1\) , \( a^{4} - a^{3} - 4 a^{2} + 3 a + 2\) , \( -7 a^{4} - a^{3} + 35 a^{2} + 3 a - 34\) , \( -8 a^{4} + 10 a^{3} + 50 a^{2} - 13 a - 57\bigr] \) ${y}^2+\left(a^{4}-a^{3}-4a^{2}+2a+2\right){x}{y}+\left(a^{4}-a^{3}-4a^{2}+3a+2\right){y}={x}^{3}+\left(-a^{4}+a^{3}+4a^{2}-a-1\right){x}^{2}+\left(-7a^{4}-a^{3}+35a^{2}+3a-34\right){x}-8a^{4}+10a^{3}+50a^{2}-13a-57$
4.1-a4 4.1-a 5.5.81509.1 \( 2^{2} \) 0 $\Z/2\Z$ $\mathrm{SU}(2)$ $1$ $447.2294659$ 1.17486750 \( -383866242875132341 a^{4} + 821906963243723177 a^{3} + 981429731922769491 a^{2} - 2271536193148794877 a + 672783536171615834 \) \( \bigl[a^{4} - a^{3} - 3 a^{2} + 3 a\) , \( a^{4} - a^{3} - 4 a^{2} + 2 a + 1\) , \( a^{4} - 5 a^{2} + 4\) , \( 4 a^{4} - 10 a^{3} - 2 a^{2} + 28 a - 32\) , \( 16 a^{4} - 39 a^{3} - 36 a^{2} + 116 a - 31\bigr] \) ${y}^2+\left(a^{4}-a^{3}-3a^{2}+3a\right){x}{y}+\left(a^{4}-5a^{2}+4\right){y}={x}^{3}+\left(a^{4}-a^{3}-4a^{2}+2a+1\right){x}^{2}+\left(4a^{4}-10a^{3}-2a^{2}+28a-32\right){x}+16a^{4}-39a^{3}-36a^{2}+116a-31$
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  *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.