[quote=henryzz;222290]437*2^850256-1 is prime
That's my first top 5000 prime in 9 months and my largest by far.[/quote]

Congrats David! It's nice to catch the big ones. :smile:

Finally...the first rally prime :smile:

567*2^860497-1 is prime

Lennart found:

527*2^856404-1 is prime

451*2^867501-1 is prime.

Congrats to your 2nd-lagest prime so far! And a prime not from the Mini-Drive! :smile:

549*2^868860-1 is prime

501*2^869927-1 is prime

545*2^874596-1 is Prime

Lennart

567*2^882408-1 is prime

563*2^877856-1 is Prime

Lennart

579*2^878796-1 is Prime

Lennart