%I A123692
%S A123692 2,20771,40487,53471161,1645333507,6692367337,188748146801
%N A123692 Primes p such that p^2 divides 5^(p-1) - 1.
%H A123692 C. K. Caldwell, The Prime Glossary, <a href="http://primes.utm.edu/glossary/
               page.php?sort=FermatQuotient">Fermat quotient</a>.
%Y A123692 Cf. A001220, A014127, A123693.
%Y A123692 Cf. A096082, A090968.
%Y A123692 Sequence in context: A159730 A158344 A124364 this_sequence A132942 A131558 
               A133857
%Y A123692 Adjacent sequences: A123689 A123690 A123691 this_sequence A123693 A123694 
               A123695
%K A123692 hard,nonn
%O A123692 1,1
%A A123692 Max Alekseyev (maxale(AT)gmail.com), Oct 07 2006
%E A123692 More terms from Alexander Adamchuk, Nov 27 2006