|
%I #19 Nov 14 2019 12:56:11
%S 2,3,5,7,38,2319,2996,3321,3892
%N Numbers n such that (n!)^2-n!+1 is prime.
%C a(1)-a(9) are verified primes using BLS option in pfgw. - _Robert Price_, Aug 24 2014
%C a(10) > 15000. - _Robert Price_, Aug 24 2014
%H C. K. Caldwell, <a href="http://www.utm.edu/research/primes/">The Prime Pages</a>
%H C. Nash, <a href="http://pages.prodigy.net/chris_nash/primeform.html">Prime Form</a> [?Broken link]
%H M. Oakes, <a href="http://groups.yahoo.com/group/primeform/message/10881">Re: Gaussian primorial and factorial primes</a>, Primeform, Dec 21 2010
%H Mike Oakes, Andrew Walker, David Broadhurst, <a href="/A046029/a046029.txt">Gaussian primorial and factorial primes</a>, digest of 7 messages in primeform Yahoo group, Dec 20 - Dec 21, 2010.
%o (PARI) isok(n) = isprime((n!)^2-n!+1); \\ _Michel Marcus_, Aug 26 2013
%Y Cf. A002981, A002982, A046029, A051856.
%K nonn,hard,more
%O 1,1
%A Andrew Walker (ajw01(AT)uow.edu.au), Dec 13 1999
%E a(7)-a(9) from _Robert Price_, Aug 24 2014
|
