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A072712 Primes p such that p divides the (right) concatenation of all numbers from 1 to p written in base 10 (most significant digit on left). 0
2, 3, 5, 8167, 371321 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Right concatenation, normal order.
Primes in A029455. - Derek Orr, Oct 04 2014
LINKS
Carlos Rivera, Puzzle 190. A follow up for the puzzle 188, The Prime Puzzles & Problems Connection.
EXAMPLE
p=17 is not a term since 1234567891011121314151617 is not divisible by 17.
PROG
(PARI) p=""; n=1; while(n<10^4, p=concat(p, Str(n)); if(eval(p)%n==0&&isprime(n), print1(n, ", ")); n++) \\ Derek Orr, Oct 04 2014
CROSSREFS
Sequence in context: A056146 A115835 A089678 * A046476 A263429 A175309
KEYWORD
base,more,nonn
AUTHOR
Jeff Heleen, Aug 07 2002
EXTENSIONS
Another term from Jeff Heleen, Oct 11 2009
STATUS
approved

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Last modified March 18 22:34 EDT 2024. Contains 370951 sequences. (Running on oeis4.)