Ruzsa’s genus-one problem

witness #1265

N
6,055
|A|
50
exponent log |A| / log N
0.4492
status
current record for this modulus
submitted by
Yongxi (Aaron) Lin
submitted at
2026-08-07 08:56:28 UTC

Elements (50)

90, 91, 95, 96, 1060, 1061, 1185, 1186, 1235, 1236, 1495, 1496, 1770, 1771, 2050, 2051, 2055, 2056, 2075, 2076, 2405, 2406, 2970, 2971, 3555, 3556, 3630, 3631, 3805, 3806, 3835, 3836, 4365, 4366, 4930, 4931, 4980, 4981, 5280, 5281, 5515, 5516, 5795, 5796, 5820, 5821, 5865, 5866, 5995, 5996

Commentary

Product construction: if S is solution-free mod m and U is solution-free mod k, then S + m·U is solution-free mod m·k (reducing the equation mod m forces the S-parts equal since 1+3-2-2=0; the quotient then forces the U-parts equal). Here S={0,1} mod 5 (optimal) and U = the current N=1211 record (25 elements), giving 2·25=50 elements mod 6055.

last edited by Yongxi (Aaron) Lin at 2026-08-07 08:56:28 UTC · history

Log in to add commentary.