OFFSET
1,2
COMMENTS
Let f(n)=n!^(1/n!). Then this number is f(2)^(f(3)^(f(5)^(...)))
EXAMPLE
1.604651218410055827983866511015173398808649754699580...
PROG
(PARI) default(realprecision, 100):t=1:forstep(n=100, 1, -1, t=(prime(n)!^(1/prime(n)!))^t):return(t)
CROSSREFS
KEYWORD
cons,nonn
AUTHOR
Mark Hudson (mrmarkhudson(AT)hotmail.com), Nov 09 2004
EXTENSIONS
Offset corrected by R. J. Mathar, Feb 05 2009
STATUS
approved