7th Drive:

2415*2^1413627-1 (425548 digits)

1323*2^1655130-1 (498247 digits)

7th Drive:

2715*2^1429628-1 (430365 digits)

187*2^1461697-1 (440017 digits)

8th drive:

5445*2^1245349-1 (374892 digits)

Lots here
 

[url]http://factordb.com/listtype.php?t=1[/url]

[QUOTE=pdazzl;371599][url]http://factordb.com/listtype.php?t=1[/url][/QUOTE]

Please explain how that link is relevant to our search. Note that your link brings up a list of PRPs, not proven primes (just for starters).

1193*2^1672244-1 (503399 digits)

1333*2^1673867-1 (503888 digits)

Added [URL="http://primes.utm.edu/primes/page.php?id=117677"]117677[/URL] : 3645*2^1212210-1 (364916 digits)

1355*2^1674156-1 (503975 digits)