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 A159265 Google primes: primes of the form 379*10^n+9 = 3790...09. 1
 379009, 379000009, 37900000009, 379000000009, 3790000000000000000000000000000000000009, 37900000000000000000000000000000000000000000009, 3790000000000000000000000000000000000000000000000000000000000000000009 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS The prime number 379009 rotated by 180 degree reads "GOOGLE". This sequence gives primes of this form with a string of 0's of arbitrary length, as it appears (upside down) on the web site of the search engine to browse the pages of available search results. REFERENCES J. Earls, Mathematical Bliss, Pleroma Publications, 2009, pages 15-17. ASIN: B002ACVZ6O [From Jason Earls (zevi_35711(AT)yahoo.com), Nov 21 2009] LINKS Jason Earls, Google-Primes, March 2008. G. L. Honaker, Jr. and Chris Caldwell, Prime Curios! 379009 FORMULA a(n) = 379*10^A159264(n)+9. MATHEMATICA Select[Table[379*10^n + 9, {n, 3, 70}], PrimeQ] (* Arkadiusz Wesolowski, Oct 05 2011 *) PROG (PARI) for( n=0, 99, ispseudoprime(379*10^n+9) & print1(379*10^n+9, ", ")) CROSSREFS Sequence in context: A133975 A133977 A133978 * A133976 A206365 A205759 Adjacent sequences:  A159262 A159263 A159264 * A159266 A159267 A159268 KEYWORD nonn,word AUTHOR M. F. Hasler, Apr 07 2009 STATUS approved

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