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A135116 Integers n such that 10^n+61 is a prime number. 1
1, 3, 4, 10, 12, 16, 33, 696, 739, 1764, 2577, 3198, 4242, 11104, 18081, 19587, 20799, 22986, 92178 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

The next term, if one exists is >100000. [From Robert Price, Jul 14 2010]

See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable or proved primes - search on "10061".

LINKS

Table of n, a(n) for n=1..19.

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

Index entries for primes involving repunits.

EXAMPLE

4 is a member because 10^4+61 = 10000+61 = 10061, which is a prime number.

CROSSREFS

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

Sequence in context: A243681 A242881 A287448 * A259559 A050187 A101506

Adjacent sequences:  A135113 A135114 A135115 * A135117 A135118 A135119

KEYWORD

more,nonn

AUTHOR

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

EXTENSIONS

Added term 11104. Robert Price, Mar 22 2010

Added terms: 1764,2577,3198,4242,18081,19587,20799,22986. Robert Price, Jul 14 2010

Edited by Ray Chandler, Dec 23 2010

a(19)=92178 by Robert Price, Apr 19 2011

STATUS

approved

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