OFFSET
1,3
COMMENTS
This constant is irrational (Hančl and Tijdeman, 2004).
LINKS
Jaroslav Hančl and Robert Tijdeman, On the irrationality of Cantor series, Journal für die reine und angewandte Mathematik, Vol. 2004, No. 571 (2004), pp. 145-158.
FORMULA
1.09306425770250716540258595269676368295547596540121...
MATHEMATICA
RealDigits[Sum[Prime[n]/2^Prime[n], {n, 1, 100}], 10, 100][[1]]
PROG
(PARI) suminf(k=1, prime(k)/2^prime(k)) \\ Michel Marcus, Jul 09 2021
CROSSREFS
KEYWORD
nonn,cons
AUTHOR
Amiram Eldar, Jul 08 2021
STATUS
approved