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 A007324 Least number for which Solovay-Strassen primality test on bases < prime(n) fails. (Formerly M5443) 3
 9, 561, 1729, 1729, 399001, 399001, 1857241, 1857241, 6189121, 14469841, 14469841, 14469841 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 REFERENCES N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence). LINKS Wikipedia, Solovay-Strassen primality test PROG (PARI) a(n) = my(b, p=factorback(primes(n-1))); forcomposite(k=9, oo, if(gcd(k, p)==1, b=2; while(Mod(b, k)^(k\2) == kronecker(b, k), b++); if(b>=prime(n), return(k)))); \\ Jinyuan Wang, Jun 04 2022 CROSSREFS Cf. A083876, A271221, A329726. Sequence in context: A317347 A267548 A326614 * A354692 A347844 A291910 Adjacent sequences:  A007321 A007322 A007323 * A007325 A007326 A007327 KEYWORD nonn,more AUTHOR N. J. A. Sloane, Eric Bach (bach(AT)cs.wisc.edu) EXTENSIONS Offset changed to 1 and a(1) corrected by Jinyuan Wang, Jun 04 2022 STATUS approved

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Last modified June 26 22:36 EDT 2022. Contains 354885 sequences. (Running on oeis4.)