OFFSET
1,5
COMMENTS
The first 23 terms were found using gwnum, and the first 22 have been independently checked using gmp.
LINKS
Mersenne Forum, A071580
PROG
(PARI) terms=12; p=2; for(n=2, terms, q=p+1; while(!ispseudoprime(q), q=q+p); print1(q\p, ", "); p=p*q) \\ Serge Batalov, May 19 2015
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Andrew R. Booker, May 19 2015
STATUS
approved