Search: id:A006794
Results 1-1 of 1 results found.

%I A006794 M2474
%S A006794 3,5,11,13,41,89,317,337,991,1873,2053,2377,4093,4297,4583,6569,
%T A006794 13033,15877
%N A006794 Primes p such that -1 + product of primes up to p is prime.
%C A006794 Or, p such that primorial(p) - 1 is prime.
%D A006794 N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, 
               Academic Press, 1995 (includes this sequence).
%D A006794 C. K. Caldwell, On The Primality of n!+- 1 and 2\cdot 3 \cdot 5\cdots 
               p+- 1, Math. Comput. 64, 889-890, 1995.
%D A006794 C. K. Caldwell and Y. Gallot, On the primality of n!+-1 and 2*3*5*...*p+-1, 
               Math. Comp., 71 (2001), 441-448.
%D A006794 H. Dubner, Factorial and primorial primes, J. Rec. Math., 19 (No. 3, 
               1987), 197-203.
%D A006794 R. K. Guy, Unsolved Problems in Number Theory, Section A2.
%H A006794 C. K. Caldwell, <a href="http://primes.utm.edu/glossary/page.php?sort=PrimorialPrime">
               Primorial Primes</a>
%H A006794 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               Primorial.html">Link to a section of The World of Mathematics.</a>
%Y A006794 A057704 gives same sequence in a different way. A057705 gives the actual 
               primes. Cf. A002110, A005234, A014545, A018239.
%Y A006794 Sequence in context: A105071 A089251 A147568 this_sequence A032457 A122564 
               A162876
%Y A006794 Adjacent sequences: A006791 A006792 A006793 this_sequence A006795 A006796 
               A006797
%K A006794 nonn,hard,nice
%O A006794 1,1
%A A006794 N. J. A. Sloane (njas(AT)research.att.com).
%E A006794 Stated incorrectly in CRC Standard Mathematical Tables and Formulae, 
               30th ed., 1996, p. 101; corrected in 2nd printing.
%E A006794 Corrected by Arlin Anderson (starship1(AT)gmail.com), who reports that 
               he and Don Robinson have checked this sequence through about 63000 
               digits without finding another term (Jul 04 2000).

Search completed in 0.002 seconds