The pp-adic valuation conjecture for the repair factor of Stirling sequences

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Let Sk(2)S^{(2)}_k denote the relevant sequence and let Fail(Sk(2)){\rm Fail}(S^{(2)}_k) be its repair factor. For a prime pp, write ∣⋅∣p|\cdot|_p for the pp-adic absolute value. The pp-adic valuation conjecture. If p<kp<k is a prime, then

∣Fail(Sk(2))∣p<1.|{\rm Fail}(S^{(2)}_k)|_p<1.

This is the first of four conjectures suggested by numerical computations because a closed formula for the repair factor seems unlikely to be accessible. The conjecture concerns the divisibility of the repair factor by primes smaller than the index.

References

Primary source

Piotr Miska and Tom Ward, “Stirling number and periodic points”, arXiv:2102.07561 (2021).

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