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23841number of selfridges?

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  • paulunderwooduk
    Dec 2, 2011
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      Hi,

      I have devised a couple of composite tests in pari-gp and now I am wondering how many selfridge units they are. Please someone here enlighten me:

      1. for kronecker(5,n)==-1:
      Mod(Mod(1,n)*(l^2-2),l^2-3*l+1)^(n+1)+9==0

      2. for kronecker(5,n)==1 and n!=(r+1)*(2*r+1):
      Mod(Mod(1,n)^(l^2-2),l^2-3*l+1)*((n+1)/2)+3*l-3==0

      (gcd(n,30)==1)

      Paul
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