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Some new kinds of pseudoprimes
Authors:Jerzy Browkin
Institution:Institute of Mathematics, University of Warsaw, ul. Banacha 2, PL--02--097 Warsaw, Poland
Abstract:We define some new kinds of pseudoprimes to several bases, which generalize strong pseudoprimes. We call them Sylow $p$-pseudoprimes and elementary Abelian $p$-pseudoprimes. It turns out that every $n<10^{12},$ which is a strong pseudoprime to bases 2, 3 and 5, is not a Sylow $p$-pseudoprime to two of these bases for an appropriate prime $p\vert n-1.$

We also give examples of strong pseudoprimes to many bases which are not Sylow $p$-pseudoprimes to two bases only, where $p=2$ or $3.$

Keywords:Strong pseudoprimes  primality testing
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