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A097937 Integers n such that ((10^n)+17)/9 is prime. +0
4
1, 2, 3, 5, 9, 11, 24, 84, 221, 1314, 2952 (list; graph; listen)
OFFSET

1,2

COMMENT

These numbers form a sequence (1)w3 where w is an integer. No others less the 5000.

1314 and 2952 both give primes.- Joao da Silva (zxawyh66(AT)yahoo.com), Sep 30 2005

No others less than 15000; search done with WinPFGW (no new terms found). - Jason Earls (zevi_35711(AT)yahoo.com), Jan 27 2008

LINKS

Makoto Kamada, Factorizations of 11...113.

EXAMPLE

11113 = ((10^5)+17)/9 and 11113 is prime.

CROSSREFS

Cf. A004023.

Sequence in context: A101737 A019276 A097683 this_sequence A124204 A099420 A051147

Adjacent sequences: A097934 A097935 A097936 this_sequence A097938 A097939 A097940

KEYWORD

hard,nonn

AUTHOR

Julien Peter Benney (jpbenney(AT)ftml.net), Sep 05 2004

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Last modified July 24 12:00 EDT 2008. Contains 142294 sequences.


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