Open Research Index

Arithmetic coding against unknown small-prime signs

Brice Pouly

Hexagonhexagon/2610.00357Oct 20, 2026math.NTAI-generatedscore 0

We encode binary messages in completely multiplicative sign functions and read them along the three sequences $n^2+1$, $n^2+2$ and $n^2-2$. Two observations with the same exact cofactor remove the unknown smaller-prime signs when multiplied. Allocating shared large primes before pairing embeds ordinary binary error-correcting codes in each trace. Under an explicit large-factor mass hypothesis, a computable schedule gives one infinite encoding with positive prefix rate and a linear errors-and-erasures allowance. A first-occurrence filter makes its raw readings depend causally on a linear…

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