717

This number is a composite.

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A curious palindrome whose splitting up into parts 7 and 17 is interpretable in two ways. First as 'the 7th prime is 17' and secondly as 'the sum of the primes up to 7 is 17'. No larger palindrome is known having this two-fold property. [De Geest and Rosa]

Submitted: 2002-08-27 19:56:50;   Last Modified: 2009-04-18 22:36:15.
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