56

This number is a composite.

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The number of products of distinct primes less than or equal to 11 (the only palindromic prime with an even number of digits) which are congruent to -1 mod 11 is 56. [Noll]

Submitted: 2000-09-16 02:24:27;   Last Modified: 2011-07-28 14:32:03.
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