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A110066 Numbers n such that 10^n - prime(n) is prime. 9
2, 5, 40, 69, 586, 927, 1393, 11411, 32741, 79040 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
There is no further term up to 10800.
a(11) > 10^5. - Robert Price, Feb 26 2015
LINKS
MATHEMATICA
Do[If[PrimeQ[10^n - Prime[n]], Print[n]], {n, 10800}]
PROG
(PARI) is(n)=ispseudoprime(10^n-prime(n)) \\ Charles R Greathouse IV, May 15 2013
CROSSREFS
Sequence in context: A307141 A109003 A120031 * A155176 A127974 A012801
KEYWORD
more,nonn
AUTHOR
Farideh Firoozbakht, Jul 12 2005
EXTENSIONS
a(8)-a(10) from Robert Price, Feb 26 2015
STATUS
approved

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Last modified April 23 03:30 EDT 2024. Contains 371906 sequences. (Running on oeis4.)