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Base field	Conductor norm	Rank*	Torsion order	CM discriminant

Base field degree/signature	Bad $p$	$\Q$-curves	Torsion structure	CM

Analytic order of Ш*	Cyclic isogeny degree	Isogeny class size	Reduction	Galois image

j-invariant	Regulator*	Curves per isogeny class	Isogeny class degree	Nonmax$\ \ell$

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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
400.1-a5	400.1-a	$8$	$12$	$\Q(\sqrt{2}, \sqrt{5})$	$4$	$[4, 0]$	400.1	$ 2^{4} \cdot 5^{2} $	$ 2^{16} \cdot 5^{4} $	$7.55886$	$(1/2a^3-2a), (-a^2+3)$	$1$	$\Z/2\Z\oplus\Z/6\Z$	$\textsf{no}$		$\mathrm{SU}(2)$	✓	✓			$2, 3$	2Cs, 3B.1.1	$1$	$ 2 \cdot 3 $	$0.561930274$	$1018.144699$	2.383859709	$ \frac{16384}{5} $	$ \bigl[0$ , $ 1$ , $ 0$ , $ -1$ , $ 0\bigr] $	${y}^2={x}^{3}+{x}^{2}-{x}$

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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.

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This project is supported by grants from the US National Science Foundation, the UK Engineering and Physical Sciences Research Council, and the Simons Foundation.