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(another Prime Pages' Curiosity)
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The smallest prime with an odd number of digits that is a member of a 'twimirp' (a twin prime pair whose members are emirps). In this case the associated emirps are 70001 and 90001. Curiously, it is also the smallest prime with an odd number of digits that is a member of 'twirp', (a emirp pair such that each is a member of a twin prime pair). In this case, the associated primes are 10009 and 70003. [Green]

 

  Submitted: 2010-01-01 15:29:09;   Last Modified: 2010-01-01 15:50:38.



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