Taking 19128.

Dropping 308232. It went down as low as 3561320 but then went up again.

Dropping 751170 (125 digits, unexamined C100)

Dropping 12408 25896 70308 405690 409656 413976 423936

413976 has a fully-ECMed C131, others uninteresting

Dropping 248736 because somebody shot my fox

Taking 102432 115680 121560 131010 133500 137820 142092 150540 157040 162348 196452

(these are 120-digits last touched in 2012; taking them to 123-digits)

Dropping 18504 91728 433290 785556

(433290 has ECMed C120; 785556 has ECMed C122; 18504 has unexamined C106, 91728 has unexamined C117)

Taking 974820

Dropping 910320
(125 digits, unexamined C111)

Dropping 305460 (broken sequence, 128 digits, fully-ECMed C122)
Dropping 974820 (123 digits, unexamined C99)

Dropping 694188 858704
(well-ECMed C124 and C123 respectively)

Dropping 31560 196152
(C109, C92)

Dropping 77040 (unexamined C97)
Dropping 131010 (unexamined C118)