CTA already taken list 1800 1850 1883 1889 1890 1900 1901 - 1904? 1914 1918 1919 1925 1928 1936 1939 1942 1945 - 1948 1950 1951 1953 1955 1960 1965 - 1967 1969 1970 - 2060 2100 2116 2200 2300 2400 2500 2501 3000 - 3030 you can band anyone besides them. https://www.mathwarehouse.com/answered-questions/factors/what-are-the-factors-of-1969-solved.php (answer = 1, 11, 179, & 1969)
