2145*2^959905-1 is prime (288964 digits)

4045*2^1100929-1 (331417 digits)
4155*2^1101359-1 (331546 digits)
4079*2^1101392-1 (331556 digits)

1179*2^1456957-1 (438591 digits)
1387*2^1818593-1 (547455 digits)

[QUOTE=Thomas11;320627]191*2^4203426-1 (1265360 digits)

My first one (and a quarter) million digits prime! :smile:[/QUOTE]

Congratulations!!! Thats one extraordinary find!!!

:bow::bow::bow::bow::bow::bow::bow::bow::bow::bow::bow:

4129*2^1104111-1 (332375 digits)

4113*2^1105346-1 (332746 digits)

4015*2^1105883-1 (332908 digits)

9351*2^920169-1 (277003 digits)

4179*2^1107188-1 (333301 digits)

4039*2^1108465-1 (333685 digits)

1295*2^1337012-1 (402484 digits)