2 papers
math.NT2026
Ours go to 211: Euler pseudoprimes to 47 prime bases (from Carmichael numbers)
Alejandra Alcantarilla Sánchez, Jolijn Cottaar, Tanja Lange +1
In this paper we show that a certain subset of the Carmichael numbers contains good Euler pseudoprimes, composite numbers that for many bases survive the Solovay-Strassen primality…
math.NT2026
Determinants of modular Collatz graphs and variants
Achilleas Karras, Benne de Weger
The determinants of modular Collatz graphs and the modular Conway amusical permutation graph are determined, and some interesting number theoretic properties are described.