A146077 Numbers n such that gcd(n, 2^n-2) does not equal the least prime factor of n.

28, 35, 45, 55, 70, 77, 95, 105, 112, 115, 119, 143, 153, 154, 155, 161, 165, 175, 186, 187, 196, 203, 209, 215, 221, 225, 231, 235, 238, 247, 253, 275, 276, 280, 285, 287, 295, 299, 319, 322, 323, 325, 329, 335, 341, 345, 355, 364, 371, 377, 385, 391, 395

Offset: 1

Author

Ray Chandler, Apr 11 2009

Keywords

• nonn

Comments

Also, positive integers n where A159353(n) differs from A032742(n).

Links

• Harvey P. Dale, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A159353, A032742.

Programs

Mathematica

Select[Range[400],GCD[#,2^#-2]!=FactorInteger[#][[1,1]]&] (* Harvey P. Dale, Dec 14 2015 *)

Extensions

Extended by Ray Chandler, Apr 11 2009