2006 Sieving and factoring challenge

[Greenbank]

Continuing the theme of last years' competition: http://www.free-dc.org/forum/showthread.php?t=8269

I'd just like to have my brief 15 minutes of fame:

http://www.aooq73.dsl.pipex.com/2006/scores.htm

1+ Greenbank

I might even be lucky enough to hold on to this until...*checks hc_grove* n=~ 10680000. ;-)

Big props to MikeH though for his 290 factors so far for low n!

[Nuri]

I feel like, this year will be the year of P-1ers and it's highly likely that hc_grove will be one of the front runners, together with frodo42 and Greenbank of course.... Good luck all.

[Greenbank]

I've got about 4000kp/sec (of SoB) sieving power but I'm about to put 3100 kp/sec of that towards an 8T range of SoB second-pass and PSP first-pass combined sieving (where that SoB 3100 kp/sec is about 1600 kp/sec for SoB+PSP combined). So I'll get a few factors n < 300k and lots n > 20M but none in between as far as SoB is concerned.

The remaining 900kp/sec (two Athlon XP's around 2GHz) will continue for SoB first-pass sieving just above 1000T.

My dual 3.0GHz Xeon is doing P-1 and it is plodding along on some low n (< 300k) as I can't guarantee it will be around for much longer.

[Greenbank]

Not bad, I lasted until late March. hc_grove will now zoom off into the lead :-)

[Matt]

I never seem to get hardly any points for my factors, I find loads but they take absolutely ages before the PRP catches up, I've only had 1 so far this year of loads of factors I've submitted!

[Greenbank]

Most of my resources are dedicated to combined sieving with PSP. Because of this I only find SoB factors < 3M or > 20M which score next to nothing.

Mind you, my PSP sieving score isn't bad. 1 month in and I should be up to #4 when Lars updates the stats.

[vjs]

Matt,

I hear you for sieve scores... However sieve has always been an investment in the projects future. Alot of the factors that we are finding now with sieve won't be used for a very long time some never at all.

However since sieve doesn't nessarily look for smooth factors those factors may never have been found using P-1. In anycase sieved factors are like money in the bank... also think of how long it will actually take to P-1 a n>40M.

I only wish that we would have invested more resources earlier, think of all the factors we are finding n<7M.

I still personally believe sieve is the way to go. PSP is doing it the correct way hopefully using us as an example.