Dropping 454728 (123 digits, ECMed C121)

Taking 53004 66984 94104 189390 190800 243342 265248 295608 448374 452400 469704 504532 711192 756630 766848 780930 784128 848304 852510 854256 976580 993270

Dropping 326340 327144 443448 502812 547422

326340: 2^2 * 3 * 7, 123 digits, ECMed C113
327144: 2 * 3 * 5, 124 digits, ECMed C122
443448: 2 * 3 * 7, 123 digits, ECMed C117
502812: 2^6 * 3^2 * 7, 123 digits, ECMed C119
547422: 2^4 * 3^2 * 31, 136 digits, ECMed C125

Dropping 452400 (2^3 * 3 * 5, ECMed C121)

Taking 102522 243402 445464 448632 783264 833490

That's the 116-digit cofactors last touched in 2012. Taking to C12x

Dropping 573474 (2^4 * 3^2, ECMed C123)

Dropping 504532 (132 digits, 2^4 * 3 * 5 * 31, ECMed C121)

Taking 71760 137394 334548.

Dropping 531120

Reserving 904188

Dropping 833490 (2^5 * 5 * ECMed C120)

Dropping 766848 ( 2^4 * 3^2 * 5^2 * 31, ECMed C122)