Taking 1669800

Dropping 1682754 (2^4*3, ECMed C119 cofactor)
Dropping 1868400 (2^5 * 3 *5^2, ECMed C117 cofactor)

Taking 1246308 1539828

Dropping 674880 (2^3*3*5; C143 cofactor has survived 4000@3e6)
Dropping 573600 (2^2 * 7 * C146 which has survived 4000@3e6)

Dropping 94368 (2^6 * 3 * C151 which has survived 4000@3e6)

Taking 1272960

Taking 1821000

Taking 1169826

Dropping 1874760 1371600 334852.

Taking 1544580

Drop 1654488 1791768