The term "Old Bolshevik" refers to those who joined the Bolshevik party before the Russian Revolution of 1917. According to D. A. Chygayev (as quoted by Mark Deutsch), in 1922 there were 44,148 living Old Bolsheviks. It is known that many of these were targeted by the Great Purge of the 1930s. Some sources go far as to say that nearly all of them were prosecuted and/or executed.
However, there do seem to be exceptions. Elena Stasova, for example, was a member of the Bolsheviks from the beginning, and served on the Central Committee before and during the revolution. She was untouched by the purge, retired peacefully in 1946, and died twenty years later.
Are there any estimates of the exact number of Old Bolsheviks who, like Stasova, survived the purges (i.e., were never charged, or were charged but fully acquitted) and outlived Stalin? If not, is there at least a list of some of the more notable ones?