OFFSET
1,1
COMMENTS
This constant is irrational (Erdős, 1958). - Amiram Eldar, Apr 13 2020
LINKS
Paul Erdős, Sur certaines séries à valeur irrationnelle (in French), Enseignement Math. (2) 4 (1958), pp. 93-100.
EXAMPLE
4.73863870268621999271779470348124955360182384664210664248096193484375408779697167489...
MATHEMATICA
RealDigits[ Sum[ Prime[n]/n!, {n, 75}], 10, 105][[1]] (* Robert G. Wilson v, Jan 18 2015 *)
PROG
(PARI) default(realprecision, 100):sum(n=1, 100, prime(n)/(n!), 0.)
CROSSREFS
KEYWORD
cons,nonn
AUTHOR
Mark Hudson (mrmarkhudson(AT)hotmail.com), Nov 11 2004
STATUS
approved