167

This number is a prime.

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The least prime factor of the smallest vampire number that has prime fangs of the same length (117067 = 167 * 701). A vampire number is an integer which can be written as the product of two factors (its "fangs") whose digits together are a rearrangement of the original number.

Submitted: 2006-08-15 15:18:44;   Last Modified: 2008-08-28 20:46:40.
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