[quote=gd_barnes;146107]?? You're doing it again KEP, stating different things on different days on huge efforts. On one hand, you want to reserve something to PrimeGrid level, which will be a multi-year CPU effort, and then on the other hand, you allow the fact that you have a few weeks on your current efforts to stop you? That is, to put it mildly, quite confusing.

Let me see if I have you down correctly now:
Sierp base 252 k=27 up to n=100K. (No status since Sept. 14th)

If you need some filler work to keep your machines busy, please take something smaller; perhaps some files from the Riesel and Sierp base 3 mini-drives.


Thanks,
Gary[/quote]

If it wasn't clear, I'm sorry, it all refers to some of the reasons earlier e-mailed to you. I suffered a setback this week, and also I forgot how much more work I've left. You've put my reservations right. Some status:

Sierp base 252 no movement since september 14th.

Again I ask you to accept my appologize, it all refers to private reasons, and a matter of concentration aswell memory. Expect no more reservations (or at least just ignore them) within the next 6 months, since my intention is to wrap what is now reserved and then leave for at least a while.

Thanks for understanding, and good luck on your own challenges :smile:

Riesel base 256 is at n=63K. No new primes to report.

This has turned out to be an annoyingly primeless stretch for this base. With top-5000 primes starting at n=~42.3K, the last 2 primes on the base were just below that with none since then in an n=20K+ stretch for the 36 k's being tested.

Continuing on to n=75K. With so many k's being tested, it's somewhat slow going but with a full quad on it, it should be done in < 2 weeks.


Gary

Riesel base 256 now at n=70K.

Nothing new to report; continuing on...

Riesel base 256 is complete to n=75K and now unreserved.

Only one prime was found for n=50K-75K...very disappointing. There are still 39 k's remaining.


Gary

Reserving the 2 k's on Sierp base 256 to get them to n=75K by year end.

[quote=gd_barnes;151713]Reserving the 2 k's on Sierp base 256 to get them to n=75K by year end.[/quote]


The two Sierp base 256 k's are now at n=72K. I started them at n=40K and hence did some overlap double-checking.

I'm going to take these to n=100K instead. (n=800K base 2) I went ahead and sieved the entire n=40K-100K range and will just keep it going.

With only 2 k's remaining, this may be the most promising power-of-2 base to prove in the forseeable future.


Gary

The 2 k's for Sierp base 256 are now at n=85K (n=680K base 2). Nothing to report. Still going to n=100K.

All powers-of-2 bases are now officially complete to n=600K base 2! :smile:

The 2 k's on Sierp base 256 are complete to n=100K. No primes.

This base is now unreserved.

Reserving Sierp base 255 to n=5K to knock out some k's. KEP had previously tested it to n=2.5K and 732 k's remainined. I'm currently at n=3K with 47 primes found so 685 k's remain. Depending on resource availability in a couple of weeks, I may continue on to n=10K.

Reserving Sierp base 33 to n=25K. I'm currently at n=8K with 6 k's remaining. This one may be provable!

It will be slow going on one slower core each but they should complete in a couple of weeks.


Gary

KEP has completed testing k=27 on Sierp base 252 to n=100K and has released it.

Sierp base 255 is complete to n=5100 and now unreserved.

For n=2500-5100, 185 primes were found, which reduced the k's remaining from 732 to 547. Info. on the web pages.

Kenneth, the k's remaining dropped from 732 to 551 from n=2500 to 5000; a 25% reduction...very high for such a high base but close to the 20% that I had expected for a high-prime 2^q-1 base.

I expect that base 127 will come in somewhere near 30%.


Gary