Mathematics Tripos Papers

  • Part IA
  • Part IB
  • Part II
  • FAQ

Paper 4, Section I, I

Number Theory | Part II, 2012

Define what it means for the composite natural number NNN to be a pseudoprime to the base bbb.

Find the number of bases (less than 21) to which 21 is a pseudoprime. [You may, if you wish, assume the Chinese Remainder Theorem.]

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