The most massive mathematical program in number theory

This paper establishes a comprehensive mathematical program investigating the struc
tural evolution of integer sequences under the iterated Euler’s totient function ϕk using
absolute difference triangles. We demonstrate a universal phenomenon of boundary decay,
where initially chaotic sequences—including linear and quadratic polynomials, prime num
bers, prime powers, and products of consecutive primes—inevitably collapse into strictly
periodic geometric boundaries. The core of this work is the formulation of the Grand Con
jecture, which asserts the existence of a minimum iteration depth N for any such sequence
to reach a stable periodic state. A significant result of this program is the derivation of the
long-standing Gilbreath’s Conjecture (1958) as a localized corollary of the broader boundary
decay mechanism applied to prime sequences. Our findings suggest that the iterated totient
function acts as a universal filter, uncovering an infinite reservoir of undiscovered periodic
structures within number theory