|
|
A096497
|
|
Prime following n-th repunit.
|
|
18
|
|
|
2, 13, 113, 1117, 11113, 111119, 1111151, 11111117, 111111113, 1111111121, 11111111113, 111111111149, 1111111111139, 11111111111123, 111111111111229, 1111111111111123, 11111111111111119, 111111111111111131, 1111111111111111171, 11111111111111111131, 111111111111111111157, 1111111111111111111189
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,1
|
|
COMMENTS
|
Not equal to A068693: first and 2nd terms differ.
|
|
LINKS
|
|
|
FORMULA
|
|
|
MATHEMATICA
|
Table[NextPrime[(10^n-1)/9], {n, 40}]
Table[NextPrime[FromDigits[PadRight[{}, n, 1]]], {n, 30}] (* Harvey P. Dale, Aug 11 2023 *)
|
|
PROG
|
(PARI) a(n) = nextprime((10^n-1)/9 + 1); \\ Michel Marcus, May 02 2016
(Python)
from sympy import nextprime
return nextprime((10**n-1)//9) # Chai Wah Wu, Nov 04 2019
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|