Properties

Label 2.2.85.1-20.1-b
Base field \(\Q(\sqrt{85}) \)
Weight $[2, 2]$
Level norm $20$
Level $[20, 10, 2w + 4]$
Dimension $2$
CM no
Base change yes

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Base field \(\Q(\sqrt{85}) \)

Generator \(w\), with minimal polynomial \(x^{2} - x - 21\); narrow class number \(2\) and class number \(2\).

Form

Weight: $[2, 2]$
Level: $[20, 10, 2w + 4]$
Dimension: $2$
CM: no
Base change: yes
Newspace dimension: $34$

Hecke eigenvalues ($q$-expansion)

The Hecke eigenvalue field is $\Q(e)$ where $e$ is a root of the defining polynomial:

\(x^{2} + 1\)

  Show full eigenvalues   Hide large eigenvalues

Norm Prime Eigenvalue
3 $[3, 3, w]$ $\phantom{-}e$
3 $[3, 3, w + 2]$ $\phantom{-}e$
4 $[4, 2, 2]$ $\phantom{-}1$
5 $[5, 5, w + 2]$ $\phantom{-}e$
7 $[7, 7, w]$ $\phantom{-}0$
7 $[7, 7, w + 6]$ $\phantom{-}0$
17 $[17, 17, w + 8]$ $\phantom{-}2e$
19 $[19, 19, w + 1]$ $\phantom{-}3$
19 $[19, 19, w - 2]$ $\phantom{-}3$
23 $[23, 23, w + 9]$ $\phantom{-}2e$
23 $[23, 23, w + 13]$ $\phantom{-}2e$
37 $[37, 37, w + 11]$ $-10e$
37 $[37, 37, w + 25]$ $-10e$
59 $[59, 59, 3w + 10]$ $-9$
59 $[59, 59, 3w - 13]$ $-9$
73 $[73, 73, w + 15]$ $-7e$
73 $[73, 73, w + 57]$ $-7e$
89 $[89, 89, -w - 10]$ $-1$
89 $[89, 89, w - 11]$ $-1$
97 $[97, 97, w + 22]$ $-e$
Display number of eigenvalues

Atkin-Lehner eigenvalues

Norm Prime Eigenvalue
$4$ $[4, 2, 2]$ $-1$
$5$ $[5, 5, w + 2]$ $-e$