Properties

Base field \(\Q(\sqrt{-2}) \)
Level 258.1
Norm 258
New dimension 1

Related objects

Base field \(\Q(\sqrt{-2}) \)

Generator \(a\), with minimal polynomial \(x^{2} + 2\); class number \(1\).

Level 258.1

Norm: 258
Ideal: \((a + 16) = \left(a\right) \cdot \left(-a - 1\right) \cdot \left(-3 a - 5\right) \)
Label: 258.1

Modular form spaces

Weight 2
Dimension of cuspidal subspace: 1
Dimension of new cuspidal subspace: 1

Newforms

There is one rational cuspidal newform at this level in the database:

label weight dimension sign base change CM
258.1-a 2 1 +1 no no