A135118 Integers k such that 10^k + 51 is a prime number.

1, 2, 3, 13, 19, 81, 658, 1009, 1070, 1731, 2899, 4237, 5499, 18628, 28699, 47026

Offset

1,2

Comments

If more terms exist, then they are > 39456. - Robert Price, Aug 14 2010

See Kamada link - primecount.txt for terms, primesize.txt for discovery details including probable or proved primes - search on "10051".

Links

Table of n, a(n) for n=1..16.

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

Index entries for primes involving repunits.

Example

3 is a term because 10^3 + 51 = 1000 + 51 = 1051, which is prime.

Crossrefs

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

Sequence in context: A368396 A103087 A302485 * A274905 A234366 A084958

Adjacent sequences: A135115 A135116 A135117 * A135119 A135120 A135121

Keyword

nonn,more

Author

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

Extensions

a(8)-a(15) from Robert Price, Aug 14 2010

Edited by Ray Chandler, Dec 23 2010

a(16) from Robert Price, Dec 27 2010

Status

approved