Conjecture on elliptic Korselt numbers of Type I and anomalous primes

Let M7M\geq 7. Choose distinct primes p,qp,q uniformly at random subject to 5p,qM5\leq p,q\leq M, and set N=pqN=pq. Choose an elliptic curve E(Z/NZ)E(\mathbb{Z}/N\mathbb{Z}) uniformly at random, with good reduction at pp and qq, such that

#E(Z/pZ)=p+1apand#E(Z/qZ)=q+1aq\#E(\mathbb{Z}/p\mathbb{Z})=p+1-a_p\quad\text{and}\quad \#E(\mathbb{Z}/q\mathbb{Z})=q+1-a_q

both divide N+1aNN+1-a_N. Elliptic Korselt–anomalous-prime conjecture. The probability that

#E(Z/NZ)=N+1aN\#E(\mathbb{Z}/N\mathbb{Z})=N+1-a_N

tends to 11 as MM tends to infinity:

limMPr[#E(Z/NZ)=N+1aN]=1.\lim_{M\rightarrow\infty}\operatorname{Pr}\left[\#E(\mathbb{Z}/N\mathbb{Z})=N+1-a_N\right]=1.

This conjecture concerns how often an elliptic Korselt number of Type I is the product of distinct anomalous primes; the supplied text presents it as a conjecture from the cited earlier work, without providing evidence of resolution.

Sources & referencesView supporting material

Primary source

L. Babinkostova, A. Hernández-Espiet and H. Kim, “On Types of Elliptic Pseudoprimes”, arXiv:1710.05264 (2021).

Progress summary

Never refreshed

Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.

Solutions 0

No solutions have been posted yet.