A057329 First member of a prime sextuplet in a 2p-1 progression.

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

Offset: 1

Author

Patrick De Geest, Aug 15 2000

Keywords

• nonn

Comments

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

Examples

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

Links

• Index entries for sequences related to primes in arithmetic progressions

Crossrefs

Cf. A005382 and A005383; A057326, A057327, A057328, A057330, A005603.

Programs

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

Extensions

Offset changed by Andrew Howroyd, Aug 13 2024