"The Yishuv grew rapidly, absorbing hundreds of thousands of immigrants and, within these 30 years, the Jewish population increased from 56,000 to 600,000." (source)
"Ramban in his enumeration of the taryag counts yishuv Eretz Yisrael - conquering and settling Eretz Yisrael - as one of the 613 mitzvot." (source)