Fermat Pseudoprimes and Carmichael Numbers
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- Introduction to Carmichael Numbers When you first encountered Fermat's little theorem, you must have pondered if the reverse is true. That is, if an≡a(modn)a^n\equiv a\pmod nan≡…
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- Prove that 561561561 is a Carmichael number. Is there a smaller such number?
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- Prove that 341341341 is a pseudoprime base 222.
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