Quote:
Originally Posted by devarajkandadai
Another set of continued product Carmichael numbers ( prefer to call them "spiral Carmichael numbers"): a)2821 = 7*13* 31
b)172081= 7*13*31*61
c)31146661 = 7*13*31*61*181
d)16850343601= 7*13*31*61*181*541
Important point: possibility of constructing such spiral Carmichael numbers strengthens my conjecture that, r, the number of prime factors of a Carmichael number is not bounded.

Another set of spiral Carmichael numbers: 252601 = 41*61*101
151813201 = 41*61*101*601
182327654401=41*61*101*601*1201
875355068779201 = 41*61*101*601*1201*4801*
12605988345489273601 = 41*61*101*601*1201*4801*14401
726117534688527648691201 = 41*61*101*601*1201*4801*14401*57601