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A074327 Smaller of twin primes arising in A074326. 1
3, 311, 1619, 3671, 1742537, 148948139, 2777105129, 16149760533341, 10082409897709157 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..9.

FORMULA

a(n) = prime(m) where m=2^x and prime(m+1)-prime(m) = 2.

a(n) = A033844(A074326(n)). - Michel Marcus, Aug 28 2019

EXAMPLE

8th term in A074326 is 39, so prime[549755813888]=16149760533341=a(8) and 16149760533343 is the larger twin.

MATHEMATICA

s=0; Do[s=Prime[1+2^n]-Prime[2^n]; If[s==2, Print[Prime[2^n]]], {n, 1, 40}]

CROSSREFS

Cf. A051439, A033844, A073798, A000079, A074325, A074326.

Sequence in context: A085319 A123032 A132305 * A179109 A316329 A062333

Adjacent sequences:  A074324 A074325 A074326 * A074328 A074329 A074330

KEYWORD

more,nonn

AUTHOR

Labos Elemer, Aug 21 2002

EXTENSIONS

Corrected and extended by Michel Marcus, Aug 28 2019

STATUS

approved

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Last modified August 10 20:21 EDT 2022. Contains 356039 sequences. (Running on oeis4.)