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Primes e Regex

• To: mathgroup at smc.vnet.net
• Subject: [mg129956] Primes e Regex
• From: Salvatore Gambino <adoil11 at hotmail.com>
• Date: Wed, 27 Feb 2013 23:45:34 -0500 (EST)
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• References: <512CCBF6.8010504@wolfram.com>

 I am Salvatore from Sicily Italy, a student in mathematics that uses
 Mathematica 9 and engaged, at the time, in the study of Primes .
 I have a problem with the function of Mathematica Regular Expression (
 REGEX ).

 MY PROBLEM.. :    Given a string of characters 0 and / or 1 of indefinite length (10, 100, 1000, 1000000 .........., characters),    which is the source code REGULAR  EXPRESSION ( Regex  )  of MATHEMATICA for searching a substring of n characters (20 ....) with jumps, steps, of equal length (20 ....) of the sub-string?