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Forum: Prime Gap Searches 2021-05-05, 08:43
Replies: 244
Sticky: Prime Gap News
Views: 50,129
Posted By SethTro
Couple of updates in April / May Exciting...

Couple of updates in April / May

Exciting news from Martin Raab about some new top 5 largest gaps coming later this year.

Craig did it again! They submitted the third largest gap by merit...
Forum: Prime Gap Searches 2021-05-04, 10:44
Replies: 244
Sticky: Prime Gap News
Views: 50,129
Posted By SethTro
Yay on the new finds, we haven't had any 1M+ gaps...

Yay on the new finds, we haven't had any 1M+ gaps this year so 3M+ is amazing! A list of factors might help; I'll run the math to see what an optimal sieve size is once the gapsize and startsize are...
Forum: Prime Gap Searches 2021-04-17, 06:03
Replies: 244
Sticky: Prime Gap News
Views: 50,129
Posted By SethTro
I made a new video showing improvements to...

I made a new video showing improvements to average merit over the last two years.
https://www.youtube.com/watch?v=aCW1IyLJF0Y


You can see Craig has improved the 2,000 to 15,000 range by several...
Forum: Prime Gap Searches 2021-04-15, 19:56
Replies: 244
Sticky: Prime Gap News
Views: 50,129
Posted By SethTro
New Top 3 Record

Craig did it again! They submitted a merit 38.4 record (https://primegap-list-project.github.io/lists/top20-overall-merits/) in a batch of 541#/210 updates...
Forum: Prime Gap Searches 2021-04-08, 22:14
Replies: 45
Views: 16,319
Posted By SethTro
I had an artificial limit on the multiplier to be...

I had an artificial limit on the multiplier to be small than 2^62, not sure why. I removed it now (maybe I should have increased to 128 bits but muh).
...
Forum: mersenne.ca 2021-04-07, 23:25
Replies: 620
Sticky: mersenne.ca
Views: 71,788
Posted By SethTro
cat B1_B2.txt | awk '$6 ~ /^[0-9]+$/ && $6 > 100...

cat B1_B2.txt | awk '$6 ~ /^[0-9]+$/ && $6 > 100 { print $2, $4 }' | xargs -I{} sh -c 'echo {}; echo "2^31-1" | ecm -v {} | grep -A2 "Expected number" | tail -n 2' | tee curves.txt

ECM seems to...
Forum: mersenne.ca 2021-04-07, 21:51
Replies: 620
Sticky: mersenne.ca
Views: 71,788
Posted By SethTro
@James The table lookup is what our code already...

@James The table lookup is what our code already does. Maybe a good next step would be for you to produce the 100 most common B1/B2 pairs (rounding B2 down to the nearest million for large values)...
Forum: Prime Gap Searches 2021-04-07, 01:29
Replies: 244
Sticky: Prime Gap News
Views: 50,129
Posted By SethTro
Craig found a new top 10 gap (slightly edging my...

Craig found a new top 10 gap (slightly edging my record out of 9th place)!


14772 Loizides 2021 37.0585 269315265958061*397#/210 -8002

In total 22 of the top 100 merit gaps have been found by...
Forum: Prime Gap Searches 2021-04-03, 00:55
Replies: 244
Sticky: Prime Gap News
Views: 50,129
Posted By SethTro
Craig has continued with small gaps improving...

Craig has continued with small gaps improving several hundred records <12000.
Including this new top 20 merit gap as well as many other top 100 / top 200 merit gaps.
10470 36.3971 Craig Loizides...
Forum: Prime Gap Searches 2021-04-03, 00:12
Replies: 45
Views: 16,319
Posted By SethTro
If it was every a record it ends up in the git...

If it was every a record it ends up in the git log and you can find them, if isn't a record at the time of discovery I don't know of any record keeping (you can submit them to my website and they end...
Forum: Miscellaneous Math 2021-03-24, 07:09
Replies: 7
Views: 578
Posted By SethTro
These properties are used by the prime gap...

These properties are used by the prime gap search.

Also true of primorials,

for P# if P# +-1 are not prime then there are no primes in [P#-P, P#+P]

For P#/2 if P# +- 2^n are not prime then...
Forum: Prime Gap Searches 2021-03-21, 08:38
Replies: 244
Sticky: Prime Gap News
Views: 50,129
Posted By SethTro
Welcome to Craig Loizides! Craig has been...

Welcome to Craig Loizides!

Craig has been doing very small searches including an improvement to gap=1444 (70835497433946172330027 Merit 27.4) which is the smallest gap improved in 2+ years.

And...
Forum: Prime Gap Searches 2021-03-21, 08:28
Replies: 45
Views: 16,319
Posted By SethTro
You can see the raw list (it's too large for...

You can see the raw list (it's too large for github to display in the nice editor)

https://raw.githubusercontent.com/primegap-list-project/prime-gap-list/server/allgaps.sql

The issue would only...
Forum: Prime Gap Searches 2021-03-18, 23:29
Replies: 45
Views: 16,319
Posted By SethTro
Server code just doesn't support it yet (if you...

Server code just doesn't support it yet (if you add "/1" after 83# it probably would).

Should be fixed now
Forum: mersenne.ca 2021-03-17, 21:06
Replies: 620
Sticky: mersenne.ca
Views: 71,788
Posted By SethTro
Sorry should have been (1 - 1/needed_curves)...

Sorry should have been

(1 - 1/needed_curves) ^ curves_complete
Forum: mersenne.ca 2021-03-17, 19:14
Replies: 620
Sticky: mersenne.ca
Views: 71,788
Posted By SethTro
Looks good, I verified: table doesn't show when...

Looks good, I verified:
table doesn't show when no ECM
table doesn't show large digits when no (or few) curves have been complete
table seems to correctly counts curves

Few notes:
* Huge...
Forum: mersenne.ca 2021-03-17, 00:39
Replies: 620
Sticky: mersenne.ca
Views: 71,788
Posted By SethTro
Perfect I see it now (after I reloaded without...

Perfect I see it now (after I reloaded without cache).

I wrote some simple starting code for estimating factoring progress...
Forum: mersenne.ca 2021-03-16, 23:45
Replies: 620
Sticky: mersenne.ca
Views: 71,788
Posted By SethTro
I'm not sure you enabled the change in...

I'm not sure you enabled the change in production, I'm seeing 206 rows including
"123456 654321000 2 0.002" and
"1000 10000 1 2.40618e-7"
which I believe would be filtered by your proposed...
Forum: mersenne.ca 2021-03-16, 10:34
Replies: 620
Sticky: mersenne.ca
Views: 71,788
Posted By SethTro
I really appreciate the "ECM Summary" which gives...

I really appreciate the "ECM Summary" which gives a quick sense of the ECM work that's been complete. Would you consider

1. Adding an "ECM Summary" summary row
This could be as simple as "X total...
Forum: Prime Gap Searches 2021-03-06, 07:22
Replies: 244
Sticky: Prime Gap News
Views: 50,129
Posted By SethTro
I found a new top 20 merit record 53608 ...

I found a new top 20 merit record

53608 1703532329*1511#/234570-25210 Merit=36.2620

It's just below my other 2021 record

78350 974879377*2221#/4626930-49418 Merit=36.2822
Forum: Prime Gap Searches 2021-02-28, 08:20
Replies: 46
Views: 5,101
Posted By SethTro
New Speedups

I made a theoretical inspection to modulo_search and found two ~10% improvements so combined_sieve for deep sieves should be ~20-30% faster.

If anyone had an Intel CPU I'd be curious to see the...
Forum: mersenne.ca 2021-02-26, 14:01
Replies: 620
Sticky: mersenne.ca
Views: 71,788
Posted By SethTro
Perfect! I didn't know about that page :)

Perfect! I didn't know about that page :)
Forum: mersenne.ca 2021-02-26, 09:28
Replies: 620
Sticky: mersenne.ca
Views: 71,788
Posted By SethTro
I've been doing P-1 and ECM for some of the...

I've been doing P-1 and ECM for some of the exponents with most factors and I'm tired of having to copy past 6+ factors for worktodo lines like this...
Forum: Prime Gap Searches 2021-02-21, 22:53
Replies: 244
Sticky: Prime Gap News
Views: 50,129
Posted By SethTro
This list is updated manually approximately twice...

This list is updated manually approximately twice a month

https://primegap-list-project.github.io/lists/missing-gaps/

As of today the ten smallest missing gaps are: 113326, 115694, 117238,...
Forum: Prime Gap Searches 2021-02-20, 14:32
Replies: 244
Sticky: Prime Gap News
Views: 50,129
Posted By SethTro
You are filling these in rapidly! Of the 25...

You are filling these in rapidly! Of the 25 missing gaps < 125,000 initially posted you've found 8 and DStevens, M.Jansen and I have found 1 each!
Showing results 1 to 25 of 271

 
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