OFFSET
1,2
COMMENTS
For n > 1, a(n) is even.
a(7) > 20239. - J.W.L. (Jan) Eerland, Mar 03 2023
a(7) > 30000. - Michael S. Branicky, Aug 23 2024
EXAMPLE
66 is in the sequence because 1.2.3...65.66 + prime(66) is prime.
MATHEMATICA
n=1; Monitor[Parallelize[While[True, If[PrimeQ[Prime[n]+FromDigits[Join@@IntegerDigits/@Range[n]]], Print[n]]; n++]; n], n] (* J.W.L. (Jan) Eerland, Mar 03 2023 *)
CROSSREFS
KEYWORD
nonn,base,more
AUTHOR
Farideh Firoozbakht, Feb 19 2004
EXTENSIONS
Edited by Charles R Greathouse IV, Apr 29 2010
a(6) from Max Alekseyev, Jan 28 2012
STATUS
approved