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A135114 Integers n such that 10^n+69 is a prime number. 1
1, 3, 4, 5, 10, 11, 16, 35, 49, 69, 119, 223, 400, 775, 1003, 1523, 2225, 6793, 7018, 13600, 76801 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Next term in sequence, if one exists is >100000. [From Robert Price, Apr 25 2011]

See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable or proved primes - search on "10069".

LINKS

Table of n, a(n) for n=1..21.

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

Index entries for primes involving repunits.

EXAMPLE

5 is a member because 10^5+69 = 100000+69 = 100069, which is prime.

CROSSREFS

Cf. A095688, A108052, A108050, A108312, A107083, A108049, A108054.

Sequence in context: A139445 A185345 A260823 * A240789 A191647 A195131

Adjacent sequences:  A135111 A135112 A135113 * A135115 A135116 A135117

KEYWORD

more,nonn

AUTHOR

Julien Peter Benney (jpbenney(AT)gmail.com), Feb 12 2008

EXTENSIONS

Added term 13600. Robert Price, Mar 22 2010

Inserted 5 terms: 1003,1523,2225,6793,7018. Robert Price, Oct 31 2010

Edited by Ray Chandler, Dec 23 2010

a(21)=76801 from Robert Price, Mar 03 2011

STATUS

approved

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