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A107084 Integers n such that 10^n+33 is prime. 1
1, 3, 6, 9, 10, 31, 47, 70, 281, 366, 519, 532, 775, 1566, 1627, 2247, 2653, 4381, 4571, 7513, 10581, 13239, 15393, 72267 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

The next term, if it exists, is >39546. [From Robert Price, Aug 21 2010]

See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable or proved primes - search on "10033".

LINKS

Table of n, a(n) for n=1..24.

Makoto Kamada, List of near-repdigit-related prime numbers.

Index entries for primes involving repunits.

EXAMPLE

For n = 3 we get 10^3+33 = 1000+33 = 1033, which is prime.

CROSSREFS

Cf. A049054, A088274, A088275, A095688, A108052, A108050, A108049, A108054.

Sequence in context: A085780 A166047 A223999 * A224353 A224012 A065940

Adjacent sequences:  A107081 A107082 A107083 * A107085 A107086 A107087

KEYWORD

more,nonn

AUTHOR

Julien Peter Benney (jpbenney(AT)ftml.net), Jun 08 2005

EXTENSIONS

a(20)-a(23) from Robert Price, Aug 21 2010

Edited by Ray Chandler, Dec 23 2010

a(24)=72267 from Robert Price, Jan 29 2011

STATUS

approved

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Last modified September 26 05:09 EDT 2017. Contains 292502 sequences.