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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, Nov 21 2009]
LINKS
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 A286009 A295454
KEYWORD
nonn,word
AUTHOR
M. F. Hasler, Apr 07 2009
STATUS
approved

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Last modified March 18 22:56 EDT 2024. Contains 370952 sequences. (Running on oeis4.)