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%I
%S 0,3,10,22,59,84
%N Numbers n such that (10^n)^4+(10^n+1)^4 is prime.
%C No more terms up to n=4200.
%H Prime Curio, <a href="http://primes.utm.edu/curios/page.php?number_id=4781">200..400..600..400..1</a>
%o (PARI) is(n)=ispseudoprime((10^n)^4+(10^n+1)^4) \\ _Charles R Greathouse IV_, Jun 13 2017
%K more,nonn
%O 1,2
%A _Jason Earls_, Dec 15 2009
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