Take 1498440

Drop 1729392 (2^5*3, ECMed C117)
Drop 1776654 (2^4*7*31*ECMed C112)
Drop 1794156 (2^3*3*5, ECMed C124)

Drop 1975080
Update 1706160 1714128 1715274 1716552 1732944 1756512 1778766

Drop 1700190 (2^2*7*ECMed C112)
Drop 1736868 (2^4*31, ECMed C115)
Drop 1842312 (2^2*7, ECMed C113)

Update 1129520

Drop 1129520 (2^3*3, C144 has survived 4000@3e6)

Drop 1809960 at index 1003.

It kind of simultaneously reached 1000 terms, size 150, a C145 cofactor (ecm'd to t45) and it is stuck with a partial D5 (2^5*3*7) - each of this would have been by itself enough for a 7 digits starter...

Take 1700190

Drop 662856 (2^3*3*5^2, C146 has survived 4000@3e6)

Drop 1758144 (2^2*3*ECMed C117)

Take 1903224 1906200 1906272 1913640 1915650 1916800 1918416 1934190
Take 1936080 1937340 1942530 1942704 1944774 1947780 1955016 1956864
Take 1963206 1966120 1968672 1969902 1974072 1986414 1986720 1990422

Take 1542834