A158848 Prime numbers p where 2^k-p is prime, with k>6 and minimal.

67, 97, 109, 149, 167, 173, 197, 227, 233, 239, 251, 271, 283, 313, 331, 349, 373, 409, 433, 439, 499, 509, 521, 557, 563, 593, 641, 677, 743, 761, 773, 797, 827, 857, 887, 911, 941, 953, 971, 977, 983, 1013, 1019, 1021, 1039, 1051, 1129, 1171, 1237, 1279, 1291, 1297, 1321

Offset

1,1

Comments

These are the primes removed according to algorithm of A156284 beginning with m=7.

Powers 2^m, m>=7, are not expressible as sums of two primes which are not in the sequence.

Links

Bill McEachen, Table of n, a(n) for n = 1..10000

Formula

a(n) = A086081(n+11). - Bill McEachen, Jan 22 2023

Prog

(PARI) isok(p) = if (isprime(p), my(k=ceil(log(p)/log(2))); (k >= 7) && isprime(2^k-p)); \\ Michel Marcus, Jan 22 2023

Crossrefs

Cf. A152451, A156284, A158756, A158759, A158846, A158847, A086081.

Sequence in context: A130059 A039539 A256176 * A232634 A302345 A276307

Adjacent sequences: A158845 A158846 A158847 * A158849 A158850 A158851

Keyword

nonn

Author

Vladimir Shevelev, Mar 28 2009

Extensions

Missing terms 773, 797, 827, 857 added by Michel Marcus, Jan 23 2023

New name from Bill McEachen, Jan 22 2023

Status

approved