[seqfan] A068652 Numbers such that every cyclic permutation is a prime.

Juan Arias de Reyna arias at us.es
Thu May 4 13:17:18 CEST 2017

In the web page 

http://tangente-mag.com/maths_etonnantes.php?id=3139 <http://tangente-mag.com/maths_etonnantes.php?id=3139>

says that after the last number showed 319993 the only remaining terms
are the repunits  primes.  

Is this true?  Perhaps a comment to A068652 with this observation
should be added?


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