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A256123 Primes p such that all six iterations of the map p->2p+nextprime(p) give primes. 0
1854811727, 1988791547, 2498711497, 2866433161, 3337303943, 3514209079, 5078536369, 5856521807, 6057449263, 7402496771, 8158654937, 8426760781, 8829158339, 10337846809, 11487954299, 11867001431, 12967520437, 14336558143 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

First prime with 7 iterations all giving primes is a(36)=44439344567.

LINKS

Table of n, a(n) for n=1..18.

CROSSREFS

Subsequence of A255694.

Sequence in context: A090874 A071371 A052094 * A251401 A325900 A251282

Adjacent sequences:  A256120 A256121 A256122 * A256124 A256125 A256126

KEYWORD

nonn

AUTHOR

Zak Seidov, Mar 15 2015

STATUS

approved

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Last modified April 5 20:30 EDT 2020. Contains 333260 sequences. (Running on oeis4.)