Скачать или смотреть 2. Show that 341 and 561 are base 2 Fermat’s pseudoprimes | Number Theory by David M. Burton

Chapter: 5 Fermat's Theorem | Elementary Number Theory by David M. Burton | B.SC Mathematics | M.SC Mathematics | Academy of Mathematical Sciences
In this lecture, we introduce the concept of pseudoprimes arising from Fermat’s Little Theorem.
We focus on base-2 Fermat pseudoprimes and rigorously prove that:
341 is a Fermat pseudoprime to base 2
561 is also a Fermat pseudoprime to base 2
These examples illustrate why Fermat’s Little Theorem does not characterize prime numbers, motivating deeper study in elementary number theory.
📌 This lecture is useful for
B.Sc Mathematics students
M.Sc Mathematics students
Undergraduate and graduate courses in Number Theory.
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