2,1037- sieve

[pinhodecarlos]

Right now NFS@Home is sieving a big task : 2,1037- (second hardest number).
16e Lattice Sieve is being used to sieve 2,1037- from q=~25M and 16e Lattice Sieve V5 from q=1000M. The former will go until q=1000M and the latter will go until necessary.
Picking up the sieve range from 25M to 1000M, where each workunit manages 1k Q values, it totals 975,000 workunits to be crunched. Each wu on my core i5 750@3.4 GHz takes an average of ~2000 seconds (64-bit linux). By myself it would take me 5642 CPU days to sieve all range. With ~800 equal cores it would take 28.1 days. Nice stats!

If q range goes to q=1200M, 34 days with ~800 cores.
If q range goes to q=1400M, 40 days with ~800 cores.

As I write:

Last 16e Lattice Sieve application wu received is at ~q=110.962M
Last 16e Lattice Sieve V5 application wu received is at ~q=1,042.327M

In the last 24 hours 6,416 16e Lattice Sieve wu's were completed. At this sieve speed the range to sieve with 16e Lattice Sieve application will be done within 139 days.

Lot's of work to be done...

Carlos

[pinhodecarlos]

Last 16e Lattice Sieve application wu received is at ~q=117.555M
Last 16e Lattice Sieve V5 application wu received is at ~q=1,046.571M

[pinhodecarlos]

Last 16e Lattice Sieve application wu received is at ~q=186.131M (goal to 1000M)
Last 16e Lattice Sieve V5 application wu received is at ~q=1,080.533M

[pinhodecarlos]

Last 16e Lattice Sieve application wu received is at ~q=288.112M (goal to 1000M)
Last 16e Lattice Sieve V5 application wu received is at ~q=1,111.760M

[pinhodecarlos]

Last 16e Lattice Sieve application wu received is at ~q=400.000M (goal to 1000M)
Last 16e Lattice Sieve V5 application wu received is at ~q=1,230.000M (goal to 1400M)

[Duke of Buckingham]

Thanks to keep us update Carlos.

[pinhodecarlos]

Last 16e Lattice Sieve application wu received is at ~q=470.000M (goal to 1000M)
Last 16e Lattice Sieve V5 application wu received is at ~q=1,250.000M (goal to 1400M)

[pinhodecarlos]

Last 16e Lattice Sieve application wu received is at ~q=555.000M (goal to 1000M)
Last 16e Lattice Sieve V5 application wu received is at ~q=1,290.000M (goal to 1400M)

[pinhodecarlos]

Last 16e Lattice Sieve application wu received is at ~q=566.000M (goal to 1000M)
Last 16e Lattice Sieve V5 application wu received is at ~q=1,295.000M (goal to 1400M)

Would be awesome to see more 16e Lattice Sieve application crunchers. Greg told that after 16e V5 reaches 1400M it will work down from the top of the 16e range until they meet in the middle.

[pinhodecarlos]

Last 16e Lattice Sieve application wu received is at ~q=583.000M (goal to 1000M)
Last 16e Lattice Sieve V5 application wu received is at ~q=1,300.000M (goal to 1400M)