1483*2^365027-1 is prime.

5655*2^642799-1 (193506 digits)

1503*2^397527-1 (119671 digits)
1523*2^454040-1 (136683 digits)
1559*2^406648-1 (122417 digits)
1559*2^491984-1 (148106 digits)
1577*2^356616-1 (107356 digits)
1577*2^373062-1 (112307 digits)
1577*2^411304-1 (123819 digits)
1577*2^485232-1 (146073 digits)

All 4 values of k (1503, 1523, 1559, 1577) were tested for n=350-500k.

5955*2^635277-1 (191242 digits)

From the 6th drive;

[URL="http://primes.utm.edu/primes/page.php?id=85839"]205*2^1019679-1[/URL] is prime! (306957 digits)

My first "mbit" prime
:fusion::fusion::fusion::fusion:

[quote=mcduck;151011]From the 6th drive;

[URL="http://primes.utm.edu/primes/page.php?id=85839"]205*2^1019679-1[/URL] is prime! (306957 digits)

My first "mbit" prime
:fusion::fusion::fusion::fusion:[/quote]
well done now you need to go for a mdigit prime:smile:
it might be fun searching for a prime that would have 1m digits in base3 then base4 and so on:smile:

[quote=henryzz;151019]well done now you need to go for a mdigit prime:smile:[/quote]

It's quite a step from 19 minutes pr test to 9-10 hours pr test :smile:

My next goal is to help as much as i can on the 6th drive, and perhaps put some cpus on the stalled 3rd drive.

Congrats, mcduck!

If you decide to look for larger primes, we have well-sieved files for 5, 15, and 17- though the 3rd drive is also somewhere near/above 1.5mbits.
-Curtis

1493*2^377656-1 is prime.

From the 6th drive: [URL="http://primes.utm.edu/primes/page.php?id=85844"]145*2^972835-1[/URL] (292855 digits)


Congrats, mcduck :grin:

[quote=VBCurtis;151049]Congrats, mcduck!
If you decide to look for larger primes, we have well-sieved files for 5, 15, and 17- though the 3rd drive is also somewhere near/above 1.5mbits.
-Curtis[/quote]

Thanks :>

For the time beeing I have decided to stay on the 6th drive. I expect to get some new hardware (intel skulltrail 8 core system) in january and will put that one to use searching for larger primes (3rd and 17).

Also, a huge thanks to those who sieved the 6th drive!