login
Sophie Germain primes that are also highly cototient numbers.
0

%I #12 Dec 22 2024 12:22:38

%S 2,23,83,89,113,419,509,659,1049,1889,3359,4409,9029,10709,11549,

%T 13649,20789,23099,57329,84629,90089,113189,115499,207479,210209,

%U 270269,314159,324869,330329,420419,570569,658349,660659,810809,840839,1021019,1138829

%N Sophie Germain primes that are also highly cototient numbers.

%H PrimeFan, <a href="http://primefan.tripod.com/EsotericIntegerSequences.html">Listing of Esoteric Integer Sequences</a>

%H PrimeFan, <a href="/A031214/a031214.pdf">Esoteric Integer Sequences</a> [Cached copy]

%Y A005384 INTERSECT A100827.

%K nonn

%O 1,1

%A _N. J. A. Sloane_, Mar 05 2012