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3895126220983308449519 = (17-1)^(17+1) - 17^17 is the
largest known prime of the form (p-1)^(p+1) - p^p where p
is prime. Its sum of digits is a palindromic prime. [Post]
To link to this page use http://primes.utm.edu/curios/page.php?number_id=7517
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