Atlas › Modular forms › Weight 2 › Level 608 › 608.2.a › 608.2.a.j

Newform orbit 608.2.a.j

Trace form

The 4 newforms in this orbit are conjugate over $\mathbb{Q}$ ; the sum of their $q$ -expansions is

$4q + 2q^{3} + q^{5} - q^{7} + 6q^{9} + 7q^{11} + 10q^{13} - 8q^{15} + 5q^{17} + 4q^{19} + 8q^{21} - 8q^{23} + O(q^{25})$

Coefficient field

The coefficients $a_n$ generate a number field of degree 4. It is generated by the eigenvalue $\alpha$ of $T = T_{3} + 2T_{5} + 3T_{7} + 4T_{11} + 5T_{13} + 6T_{17} + 7T_{23} + 8T_{29}$ , whose minimal polynomial is

$x^{4} - 133x^{3} + 552x^{2} + 290256x - 3763384$

Atkin–Lehner signs

$p$	$w_p$
2	— ( $2^2 \mid 608$ )
19	$-1$

For $p \parallel N$ every form in the orbit has $a_p = -p^{k/2-1} w_p$ .

Traces of Hecke eigenvalues

$p$	2	3	5	7	11	13	17	19	23	29	31	37	41	43	47	53	59	61	67	71	73	79	83	89	97
$\operatorname{tr} a_p$	0	2	1	−1	7	10	5	4	−8	10	−6	14	−2	3	−3	4	20	−3	8	−30	9	10	4	−16	−6

$\operatorname{tr} a_n$ for every $n \le 1000$ is in the JSON.

Provenance

Stored in the atlas: computed by Sagebrush's modular symbols engine in 0.397 s (one thread) and proven: the dimensions are certified, and the characteristic polynomial of $T$ over $\mathbb{Z}$ is reconstructed by CRT past a rigorous coefficient bound. The label, dimension and $\operatorname{tr} a_p$ for every $p < 1000$ equal LMFDB's.

The engine's checks

dim M^+ at levels [1, 2, 4, 8, 16, 19, 32, 38, 76, 152, 304, 608]: [0, 1, 2, 3, 4, 2, 6, 7, 13, 24, 44, 84] (certified at ell = 2147482873)
T = [(3, 1), (5, 2), (7, 3), (11, 4), (13, 5), (17, 6), (23, 7), (29, 8)]; h of degree 18 = 1 x 18 (phi(ord eps) x dim S_k^new); 5 primes, 0 rejected

Open in the notebook · JSON · stored data

Recompute it yourself

In Sage mode at sagebrush.space (or npx sagebrush --sage):

newform_orbits(608, 2)[9]   # 608.2.a.j

With the Rust engine (source), in engine/:

cargo run --release -p sagebrush-web --example atlas -- 608:2 1000