A131316 Smallest prime beginning with exactly n identical digits.

2, 11, 1117, 11113, 111119, 3333331, 11111117, 111111113, 4444444447, 11111111113, 444444444443, 5555555555551, 22222222222229, 222222222222227, 11111111111111101, 11111111111111119, 222222222222222221, 8888888888888888881, 1111111111111111111

Offset

1,1

Links

Alois P. Heinz, Table of n, a(n) for n = 1..200

Example

a(4) = 11113 because 11113 is the smallest prime beginning with exactly 4 identical digits.
a(18) = 8888888888888888881 > a(19) = 1111111111111111111, which begins with exactly 19 identical digits. - Alois P. Heinz, Sep 05 2011

Crossrefs

Different from A034388.

Sequence in context: A306909 A084673 A034388 * A062636 A343900 A343929

Adjacent sequences: A131313 A131314 A131315 * A131317 A131318 A131319

Keyword

base,nonn

Author

Shyam Sunder Gupta, Sep 29 2007

Extensions

More terms from Alois P. Heinz, Sep 05 2011

Status

approved