Instances of the use of the 6 million figure:

New York Times, May 7, 1920: “Jewish war sufferers in Central and Eastern Europe, where six millions face horrifying conditions of famine, disease and death.”

New York Times, May 5, 1920, p. 9: “…To save six million men and women in Eastern Europe from extermination by hunger and disease.”

New York Times, May 5, 1920, p. 19: “Six million starving, fever-stricken sufferers in war-torn Europe appeal to us.”

New York Times, May 3, 1920, p. 11: “Your help is needed to save the lives of six million people in Eastern and Central Europe.”

New York Times, May 2, 1920, p. 1: “…Six million human beings, without food, shelter, clothing or medical treatment.”

New York Times, May 1, 1920, p. 8: “But the lives of 6,000,000 human beings are waiting for an answer.”

New York Times, Dec. 3, 1919, p. 19: “nothing on earth except a miracle can prevent the death by freezing and starvation of from 5,000,000 to 10,000,000 people in Europe and the Middle East this winter. …atrocious Jewish massacre.”

New York Times, Nov. 12, 1919, p. 7: “…tragically unbelievable poverty, starvation and disease about 6,000,000 souls, or half the Jewish population of the earth. …a million children and five million parents and elders.

The American Hebrew [above], Oct. 31, 1919, pp. 582-.: “From across the sea, six million men and women call to us for help. …six million human beings… Six million men and women are dying. …in the threatened holocaust of human life. …six million famished men and women. Six million men and women are dying…”

New York Times, Sept. 29, 1919, p. 7: “tragically unbelievable poverty, starvation and disease… about 6,000,000 souls, or half the Jewish population of the earth.”

New York Times, Aug. 10, 1917: “Germans Let Jews Die. Women and Children in Warsaw Starving to Death… Jewish mothers, mothers of mercy, feel happy to see their nursing babies die; at least they are through with their suffering.”

New York Times, Jan. 14, 1915, p. 3: “In the world today there are about 13,000,000 Jews, of whom more than 6,000,000 are in the heart of the war zone; Jews whose lives are at stake and who today are subjected to every manner of suffering and sorrow […].”

But let us go one step further back in time. In 1900, Rabbi Stephen Wise made the following statement before Jewish welfare organizations in the USA: “there are 6,000,000 living, bleeding, suffering arguments in favor of Zionism.”

Aren't you at least a little bit suspicious

The Jews picked this number almost 40 years before Hitler entered Poland

http://www.thebirdman.org/Index/Jews/Jews-History&ScripturalOriginOfThe6MillionNumber.html