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A053586 Primes formed by concatenating n consecutive decreasing numbers starting with a prime p(n) and ending with the previous prime p(n-1). 1
89888786858483, 211210209208207206205204203202201200199, 593592591590589588587, 1327132613251324132313221321, 2377237623752374237323722371, 2963296229612960295929582957 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
89888786858483 belongs to the sequence because it is a prime number obtained by concatenating all the consecutive decreasing numbers from 89 to 83 with the primes 89 and 83.
MATHEMATICA
Select[FromDigits[Flatten[IntegerDigits/@Reverse[Range[#[[1]], #[[2]]]]]]&/@Partition[ Prime[ Range[500]], 2, 1], PrimeQ] (* Harvey P. Dale, May 12 2022 *)
CROSSREFS
Cf. A053558.
Sequence in context: A317874 A185432 A288285 * A027605 A259801 A368044
KEYWORD
base,nonn
AUTHOR
Felice Russo, Jan 19 2000
STATUS
approved

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Last modified April 19 12:14 EDT 2024. Contains 371792 sequences. (Running on oeis4.)