Скачать или смотреть 3. Pseudoprimes | Show that 85 is a base 4 Pseudoprime but not base 2 | Number Theory by David

Chapter: 5 Fermat's Theorem | Elementary Number Theory by David M. Burton | B.SC Mathematics | M.SC Mathematics | Academy of Mathematical Sciences
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In this lecture, we discuss a following problem:
Show that 85 is a base 4 Pseudoprime but not base 2.
This example highlights how the concept of pseudoprimality depends on the chosen base, and why a composite integer may satisfy **Fermat’s congruence for one base but fail for another.
📌 This lecture is useful for
B.Sc Mathematics students
M.Sc Mathematics students
Undergraduate and graduate courses in Number Theory.
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