From the 4th drive:

295*2^374035-1 (112599 digits)

62985*2^341660-1 (102855 digits)

k=177 strikes again! :w00t:

177*2^663601-1 (199767 digits)

From the 4th drive:

295*2^389903-1 (117375 digits)

My lucky weekend (both from the 4th drive):

217*2^398605-1 (119995 digits)
275*2^398928-1 (120092 digits)

:banana: :george: :banana:

3645*2^347584-1 (104637 digits)

From the 4th drive:

241*2^407709-1 (122736 digits)

Surprisingly, two more primes in succession from k=177 :shock: :w00t:

177*2^665874-1 (200451 digits)
177*2^668682-1 (201296 digits)

:banana:

3645*2^348491-1 (104910 digits)

Kosmaj hit the jackpot with 177 there!

201*2^285534-1 is prime.
Edit to add: So is 99*2^435301-1.
-Curtis

:george: 205*2^420297-1 (126000 digits) :george: