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Why do Carmichael numbers (appear to) frequently end in $1$?
number-theory
carmichael-numbers
Carmichael number divisible by a given positive integer
elementary-number-theory
reference-request
conjectures
carmichael-numbers
$n$ such that $ n^2 \mid \varphi(n)^{\varphi(n)} - 1 $. Can $n$ be a prime number $n>2$ or a Carmichael number?
number-theory
prime-numbers
carmichael-numbers
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