1195*2^1703221-1 (512724 digits)

297*2^1745377-1 (525414 digits)

4017*2^1417682-1 (426769 digits)

4023*2^1418518-1 (427021 digits)

243 · 2[SUP]2147387[/SUP] - 1 ([URL="http://primes.utm.edu/primes/page.php?id=117378"]646431 digits[/URL])

1305*2^1616072-1 (486490 digits)

4089*2^1419992-1 (427464 digits)

8th drive:
6555*2^1225770-1 (368998 digits)

1179*2^1621053-1 (487989 digits)

4039*2^1424325-1 (428769 digits)

1107*2^1622806-1 (488517 digits)