Copeland-Erdős constant
The Copeland-Erdős constant is the concatenation![]()
of “0.” with the base 10 representations of the prime numbers
![]()
in order. Its value is approximately 0.235711131719232931374143… listed in A033308 of Sloane’s OEIS.
The larger Smarandache-wellin numbers![]()
approximate the value of this constant multiplied by the appropriate power of 10.
Its continued fraction![]()
is
and is listed in A030168 of the OEIS.
In base 10, this is a normal number![]()
, a fact proven by A.H. Copeland and Paul Erdős in 1946 (hence the name of the constant).