

A057329


First member of a prime sextuplet in a 2p1 progression.


10



16651, 33301, 165901, 331801, 385591, 445741, 478801, 580471, 1203121, 1768441, 1943371, 2041201, 2131141, 2240941, 2340661, 2393431, 2526721, 3277471, 3536881, 3623881, 3880381, 3897631, 4123621, 4415371, 4481881, 5278591
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

0,1


COMMENTS

Numbers n such that n remains prime through 5 iterations of function f(x) = 2x  1.


LINKS

Table of n, a(n) for n=0..25.
Index entries for sequences related to primes in arithmetic progressions


EXAMPLE

First sextuplet is (16651,33301,66601,133201,266401,532801).


PROG

(Magma) [ p: p in PrimesUpTo(6*10^6)  forall{q: k in [1..5]  IsPrime(q) where q is 2^k*(p1)+1} ]; // Bruno Berselli, Nov 23 2011


CROSSREFS

Cf. A005382 and A005383; A057326, A057327, A057328, A057330, A005603.
Sequence in context: A183657 A247693 A170788 * A349773 A232450 A317179
Adjacent sequences: A057326 A057327 A057328 * A057330 A057331 A057332


KEYWORD

nonn


AUTHOR

Patrick De Geest, Aug 15 2000


STATUS

approved



