Ruzsa’s genus-one problem

witness #1645

N
3,725
|A|
50
exponent log |A| / log N
0.4758
status
current record for this modulus
submitted by
Yongxi (Aaron) Lin
submitted at
2026-08-08 01:31:59 UTC

Elements (50)

0, 422, 425, 427, 447, 450, 452, 572, 597, 716, 721, 725, 741, 746, 750, 1160, 1185, 1312, 1337, 1460, 1470, 1485, 1495, 1905, 1907, 1930, 1932, 2062, 2087, 2660, 2685, 2797, 2822, 2946, 2956, 2971, 2981, 3397, 3400, 3407, 3422, 3425, 3432, 3542, 3567, 3691, 3695, 3700, 3716, 3720

Commentary

High-density paired-fiber witness found by iterating the deformation/repair pattern. Start from the 50-point N=3775 record, affine-normalize it so it is B+(0,25), write the 25 fiber bases as m*151+r, and deform 151 -> 149. Among the affine normalizations, multiplier 754 gives a 50-point N=3725 candidate with only two conflict classes. Repair entirely at fiber level: remove six fiber bases {567,577,2067,2206,2216,2961} and insert {572,721,2797,2946,3542,3691}. The result remains exactly B+(0,25) with 25 fibers and is valid. Score 50/sqrt(3725) ≈ 0.81923192.

last edited by Yongxi (Aaron) Lin at 2026-08-08 01:31:59 UTC · history

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