The OEIS is supported by the many generous donors to the OEIS Foundation.

 Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 59th year, we have over 358,000 sequences, and we’ve crossed 10,300 citations (which often say “discovered thanks to the OEIS”). Other ways to Give
 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A057329 First member of a prime sextuplet in a 2p-1 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 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*(p-1)+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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 5 15:27 EST 2022. Contains 358588 sequences. (Running on oeis4.)