OFFSET
1,1
COMMENTS
10537 is a term because it is composite (= 41*257) and the totient (A000010) iterating "trajectory" starting from 10537 and ending in 1 is longer (length 15) than any similar trajectory starting from a (prime or nonprime) N < 10537.
CROSSREFS
KEYWORD
nonn
AUTHOR
Jeppe Stig Nielsen, Oct 05 2019
STATUS
approved