"Toll of Irish Holocaust. The 1841 census of Ireland revealed a population of 10,897,449. This figure includes the correction factor established by that year's official partial recount. When, between 1779 and 1841, the U.S. population increased by 640 percent, and England's is estimated to have increased, despite massive emigration to its colonies, by 100 percent, it is generally accepted that Ireland's population increase was 172% 10. The average annual component of this 172% increase is x in the formula (1+ x)62 = 1 + 172%; thus 0.0163, or 1.63%. Accepting that this 1.63% rate of annual population increase continued until mid-1846 (one human gestation after the late-1845 beginning of removal of Ireland's food), the 1846 population was 11,815,011.
Assuming that rate continued, the population in 1851, absent the starvation, would have been approximately 12,809,841. However; the 1851 census recorded a population of 6,552,385; thus there was a "disappearance" of 6,257,456. This population-loss figure of 6,257,456 is scarcely susceptible to significant challenge, being derived directly from the British government's own censuses for Ireland. "