After nine years:
3343*2^7166019-1 is prime! (2157191 decimal digits) Time : 25162.456 sec. :smile:

Nine years well spent! Congrats! :tu:

Very nice prime! :smile:

That is prime!
Congratulations!

[QUOTE=Cruelty;443762]After nine years:
3343*2^7166019-1 is prime! (2157191 decimal digits) Time : 25162.456 sec. :smile:[/QUOTE]

Congrats :banana: :banana:

That's indeed a "great" prime!
Congratulations! :banana::banana:

4047*2^1934881-1 (582461 digits)

93*2^2708718-1 (815408 digits)

4173*2^1941820-1 (584550 digits)

4011*2^1945630-1 (585697 digits)

4027*2^1951909-1 (587587 digits)