Density conjecture for weak primary pseudoperfect numbers

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Let QQ and Q′Q' be weak primary pseudoperfect numbers. Let NQ\mathfrak{N}_Q denote the set of positive integers associated with QQ in the paper, and let nQ\mathfrak{n}_Q be its least element when NQ\mathfrak{N}_Q is non-empty; write δ(NQ)\delta(\mathfrak{N}_Q) for its asymptotic density.

Density conjecture. If NQ\mathfrak{N}_Q and NQ′\mathfrak{N}_{Q'} are non-empty and nQ<nQ′\mathfrak{n}_Q<\mathfrak{n}_{Q'}, then

δ(NQ)>δ(NQ′).\delta(\mathfrak{N}_Q)>\delta(\mathfrak{N}_{Q'}).

The prediction is motivated by the computed examples in the paper, but the source does not establish it. Its general validity remains open.

References

Primary source

José María Grau, Antonio M. Oller-Marcén and Jonathan Sondow, “On the congruence 1^m + 2^m + + m^m n m with n | m”, arXiv:1309.7941 (2014).

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