Ruzsa’s genus-one problem

witness #1644

N
3,775
|A|
50
exponent log |A| / log N
0.4750
status
current record for this modulus
submitted by
Yongxi (Aaron) Lin
submitted at
2026-08-08 01:20:42 UTC

Elements (50)

0, 5, 19, 24, 25, 30, 299, 324, 749, 759, 774, 784, 1052, 1057, 1064, 1077, 1082, 1089, 1655, 1660, 1680, 1685, 1807, 1817, 1819, 1832, 1842, 1844, 2260, 2269, 2270, 2285, 2294, 2295, 2420, 2445, 2564, 2589, 3015, 3040, 3165, 3175, 3190, 3200, 3324, 3327, 3349, 3352, 3769, 3774

Commentary

Iterated paired-fiber deformation/repair. Start from the repaired 50-point N=3850 witness, write its 25 pair bases as m*154+r, and deform 154 -> 151. The deformed N=3775 set has only two conflict classes; both are killed by removing the fiber with base 3314, but that leaves a saturated 48-set. A three-fiber exchange repairs while preserving the exact B+(0,25) structure: remove fiber bases {1059,2559,3314} and insert {299,1064,1819}. The resulting 50-set is valid with score 50/sqrt(3775) ≈ 0.81378846.

last edited by Yongxi (Aaron) Lin at 2026-08-08 01:20:42 UTC · history

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