A077315 Primes of the form 2^r * 11^s - 1.

3, 7, 31, 43, 127, 241, 967, 5323, 8191, 117127, 131071, 524287, 7496191, 10307263, 77948683, 253755391, 428717761, 738197503, 1714871047, 2147483647, 16240345087, 27437936767, 42218553343, 1965081755647, 2414538435583, 7024111812607, 7860327022591, 16630113370111

Offset

1,1

Links

Jinyuan Wang, Table of n, a(n) for n = 1..910

Prog

(PARI) lista(nn) = {my(q=1/2, p, w=List([])); for(r=0, logint(nn, 2), q=2*q; p=q/11; for(s=0, logint(nn\q, 11), p=11*p; if(ispseudoprime(p-1), listput(w, p-1)))); Set(w); } \\ Jinyuan Wang, Feb 23 2020

Crossrefs

Cf. A023509, A077313, A077314, A173062.

Sequence in context: A213899 A034915 A145479 * A365423 A080168 A183075

Adjacent sequences: A077312 A077313 A077314 * A077316 A077317 A077318

Keyword

nonn

Author

Amarnath Murthy, Nov 04 2002

Extensions

More terms from Ray Chandler, Aug 02 2003

a(26)-a(28) from Jinyuan Wang, Feb 23 2020

Status

approved