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A132358 a(n) = greatest prime <= 2^(2^n). 0
2, 3, 13, 251, 65521, 4294967291, 18446744073709551557, 340282366920938463463374607431768211297, 115792089237316195423570985008687907853269984665640564039457584007913129639747 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..8.

MATHEMATICA

a={}; For[n=0, n<10, n++, b=2^(2^n); While[ !PrimeQ[b], b=b-1]; AppendTo[a, b]]; a (* Stefan Steinerberger, Nov 12 2007 *)

If[PrimeQ[#], #, NextPrime[#, -1]]&/@(2^(2^Range[0, 10])) (* Harvey P. Dale, Jul 01 2020 *)

CROSSREFS

Cf. A132198.

Sequence in context: A056806 A270403 A119564 * A090100 A270314 A132484

Adjacent sequences:  A132355 A132356 A132357 * A132359 A132360 A132361

KEYWORD

nonn

AUTHOR

Leroy Quet, Nov 08 2007

EXTENSIONS

More terms from Stefan Steinerberger, Nov 12 2007

STATUS

approved

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Last modified May 12 21:06 EDT 2021. Contains 343829 sequences. (Running on oeis4.)