Chebyshev-like bias conjecture for entry points of primes in Lucas sequences
Chebyshev-like bias conjecture for entry points of primes in Lucas sequences
Let be a Lucas sequence with discriminant , and let be the entry point of a prime in , with for primes dividing but not . Define
For , set , , and , and define
Chebyshev-like bias conjecture. (Weak) If is a regular Lucas sequence with , then
(Strong) If is a regular Lucas sequence with , then for all but finitely many ; in particular, for the Fibonacci sequence ,
for all . This conjectures a strong Chebyshev-like bias favoring primes with Legendre symbol among the entry points of primes in real regular Lucas sequences. The weak and strong forms remain open in the supplied text.
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Sources & referencesView supporting material
Primary source
Tyler Ross, Zhongyan Shen and Tianxin Cai, “Cyclotomic Congruences and Lucas Sequences”, arXiv:2512.03468 (2026).
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