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%I #6 Oct 13 2017 05:32:10
%S 7,17,337,3361,25409,120977,206081,1566449
%N Smallest prime for which 2^n exactly divides the class number h(8p) and X^2 - 2pY^2 = 2 is solvable.
%H H. Cohn and J. C. Lagarias, <a href="http://doi.org/10.1090/S0025-5718-1983-0717716-8">On the existence of fields governing the 2-invariants of the classgroup of Q(sqrt{dp}) as p varies</a>, Math. Comp. 41 (1983), 711-730.
%K nonn,more
%O 1,1
%A _N. J. A. Sloane_, Feb 19 2005