A352987 Carmichael numbers (A002997) that are overpseudoprimes to base 2 (A141232).

65700513721, 168003672409, 459814831561, 13685652197857, 34477679139751, 74031531351121, 92327722290241, 206175669172201, 704077371354601, 1882982959757929, 2901482064497017, 3715607011189609, 5516564718607489, 5636724028491697, 6137426373439681, 14987802403246609

Offset: 1

Author

Daniel Suteu, May 06 2022

Keywords

• nonn

Comments

If we define f(n) to be the smallest number in the sequence with n prime factors, then we have:

f(3) = 65700513721,

f(4) <= 84286331493236478328609,

f(5) <= 3848515708338676403444146123852434164444641.

Links

• Amiram Eldar, Table of n, a(n) for n = 1..450 (calculated using data from Claude Goutier; terms 1..102 from Daniel Suteu)
• Claude Goutier, Compressed text file carm10e22.gz containing all the Carmichael numbers up to 10^22.
• Index entries for sequences related to Carmichael numbers.

Crossrefs

Intersection of A002997 and A141232.

Intersection of A291637 and A141232.