Copeland-Erdős constant

== English == === Etymology === Named after Arthur Herbert Copeland and Paul Erdős, who published a related proof in 1946. === Proper noun === the Copeland-Erdős constant (mathematics) An irrational constant that is the concatenation of "0." with the base-10 representations of the prime numbers in order, i.e. approximately 0.235711131719232931374143...