Show that 1729 is a Carmichael number.
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Originally Posted by aaronrj Show that 1729 is a Carmichael number. Theorem (Korselt 1899): A positive composite integer n is a Carmichael number if and only if n is square-free, and for all prime divisors p of n, it is true that p − 1 | n − 1 1729=7x13x19
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