This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A057329 First member of a prime sextuplet in a 2p-1 progression. 8
 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: A210272 A183657 A170788 * A196023 A108843 A224572 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 | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .