A256123 Primes p such that all six iterations of the map p->2p+nextprime(p) give primes.

1854811727, 1988791547, 2498711497, 2866433161, 3337303943, 3514209079, 5078536369, 5856521807, 6057449263, 7402496771, 8158654937, 8426760781, 8829158339, 10337846809, 11487954299, 11867001431, 12967520437, 14336558143

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