A328938 Least imprimitive Carmichael number (A328935) with n prime factors, or -1 if no such number exists.

294409, 167979421, 1152091655881, 62411762908817281, 1516087654274358001

Offset: 3

Author

Amiram Eldar, Oct 31 2019

Keywords

• nonn
• more

Comments

From Daniel Suteu, Feb 17 2020: (Start)

a(8) <= 42310088783100741554666880481,

a(9) <= 21593590390253023722267234622513201,

a(10) <= 16412975107923138847512341751620644377601,

a(11) <= 325533792014488126487416882038879701391121. (End)

a(8) > 10^22. - Amiram Eldar, Apr 22 2024

Links

• Andrew Granville and Carl Pomerance, Two contradictory conjectures concerning Carmichael numbers, Mathematics of Computation, Vol. 71, No. 238 (2002), pp. 883-908.
• Index entries for sequences related to Carmichael numbers.

Crossrefs

Cf. A002997, A006931, A328935.

Extensions

Escape clause added by Amiram Eldar, Apr 22 2024