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    Euler Pseudoprime

    Definition

    An Euler pseudoprime to the base b is a composite number n which satisfies b^((n - 1)/2) congruent ± 1 (mod n). The first few base-2 Euler pseudoprimes are 341, 561, 1105, 1729, 1905, 2047, ... (OEIS A006970).

    Related terms

    Euler-Jacobi pseudoprime | pseudoprime | strong pseudoprime

    Associated person

    Leonhard Euler

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