OFFSET
1,5
COMMENTS
Also the number of distinct prime factors of the P_n-th compositorial.
a(31) > 4 and its composite part is a 155-digit number.
a(34) >= 4. - Amiram Eldar, Jan 21 2024
LINKS
Dario Alejandro Alpern, Factorization using the Elliptic Curve Method.
Factordb.com, Status of 139!/139#+1.
Hisanori Mishimar, Compositorial + 1 (n = 4 to 150).
Reinhard Zumkeller, prime(n)!/prime(n)#+1.
MATHEMATICA
bigomega[n_Integer] := Plus @@ Last /@ FactorInteger[n]; f[n_] := Prime[n]!/Product[Prime[i], {i, n}] + 1; Table[ f[n], {n, 27}] (* Robert G. Wilson v, Mar 11 2005 *)
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Reinhard Zumkeller, Feb 20 2005
EXTENSIONS
Corrected and extended by Robert G. Wilson v, Mar 12 2005
a(31)-a(33) using factordb.com added by Amiram Eldar, Jan 21 2024
STATUS
approved