An unnamed constant
to 256 digits is also this closed expression.
0.4749493799879206503325046363279829685595493732172029822833310248 6455792917488386027427564125050214441890378494262395464775250455 2099778523950882780814821592082565202912193041770281959987798787 6404342380353179170625016170252803841553681975679189489592083858