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A159264
Numbers n such that 379*10^n+9 is a ("Google") probable prime.
1
3, 6, 8, 9, 37, 44, 67, 111, 157, 289, 1256, 1602, 2410, 2482, 2868, 3824, 3891, 6595, 8984, 9318, 10274, 45858, 59152, 86691
OFFSET
1,1
COMMENTS
The prime number 379009 rotated by 180 degree reads "GOOGLE". This sequence gives n such that "GO...OGLE" with n-1 O's is prime.
REFERENCES
J. Earls, Mathematical Bliss, Pleroma Publications, 2009, pages 15-17. ASIN: B002ACVZ6O [From Jason Earls, Nov 21 2009]
LINKS
Henri & Renaud Lifchitz, PRP Records
MATHEMATICA
Select[Range[3, 300], PrimeQ[379*10^# + 9] &] (* Arkadiusz Wesolowski, Oct 05 2011 *)
PROG
(PARI) for( n=0, 9e9, ispseudoprime(379*10^n+9) & print1(n", "))
CROSSREFS
A159265 lists the actual primes.
Sequence in context: A196370 A005622 A072960 * A329500 A287362 A055073
KEYWORD
nonn
AUTHOR
M. F. Hasler, Apr 07 2009
EXTENSIONS
a(22)-a(24) from Arkadiusz Wesolowski, Oct 15 2011
STATUS
approved