OFFSET
6,1
COMMENTS
Granville and Pomerance conjectured that most Carmichael numbers are primitive, i.e. lim_{n->oo} a(n)/A055553(n) = 0.
LINKS
Claude Goutier, Compressed text file carm10e22.gz containing all the Carmichael numbers up to 10^22.
Andrew Granville and Carl Pomerance, Two contradictory conjectures concerning Carmichael numbers, Mathematics of Computation, Vol. 71, No. 238 (2002), pp. 883-908.
EXAMPLE
a(6) = 4 since there are 4 imprimitive Carmichael numbers below 10^6: 294409, 399001, 488881, 512461.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Amiram Eldar, Oct 31 2019
EXTENSIONS
a(20)-a(22) calculated using data from Claude Goutier and added by Amiram Eldar, Apr 22 2024
STATUS
approved