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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
Sequence in context: A183657 A247693 A170788 * A349773 A232450 A317179
KEYWORD
nonn
AUTHOR
Patrick De Geest, Aug 15 2000
STATUS
approved

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Last modified April 20 05:55 EDT 2024. Contains 371799 sequences. (Running on oeis4.)