A135116 Integers k such that 10^k + 61 is a prime number.

1, 3, 4, 10, 12, 16, 33, 696, 739, 1764, 2577, 3198, 4242, 11104, 18081, 19587, 20799, 22986, 92178

Offset

1,2

Comments

The next term, if one exists is > 100000. - 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 term because 10^4 + 61 = 10000 + 61 = 10061, which is a prime number.

Crossrefs

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

Sequence in context: A242881 A287448 A325235 * A362743 A259559 A050187

Adjacent sequences: A135113 A135114 A135115 * A135117 A135118 A135119

Keyword

nonn,more

Author

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

Extensions

Term 11104 from Robert Price, Mar 22 2010

Terms 1764, 2577, 3198, 4242, 18081, 19587, 20799, 22986 from Robert Price, Jul 14 2010

Edited by Ray Chandler, Dec 23 2010

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

Status

approved