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Search: Posts Made By: SethTro
Forum: Prime Gap Searches 2021-06-19, 19:57
Replies: 15
Views: 712
Posted By SethTro
Nice! I'm happy to throw some CPU at it if...

Nice!

I'm happy to throw some CPU at it if someone else coordinates.
I would also require instructions
Forum: Prime Gap Searches 2021-06-11, 08:55
Replies: 257
Sticky: Prime Gap News
Views: 57,277
Posted By SethTro
Couple of updates Craig did it again! They...

Couple of updates

Craig did it again! They submitted the fifth largest gap by merit (https://primegap-list-project.github.io/lists/top20-overall-merits/) a 38.2 merit record! They now have the...
Forum: Prime Gap Searches 2021-06-04, 20:56
Replies: 257
Sticky: Prime Gap News
Views: 57,277
Posted By SethTro
Thank you ATH for verifying these! I manually...

Thank you ATH for verifying these! I manually entered them (always a little scary) and pushed to the GitHub repository just now (commit 3dfd00de)...
Forum: Prime Gap Searches 2021-05-30, 08:51
Replies: 257
Sticky: Prime Gap News
Views: 57,277
Posted By SethTro
I slightly updated the server. On the...

I slightly updated the server. On the prime-gap-list github I deleted the extra server branch and everything happens directly out of the master branch. I also updated the README file.
...
Forum: PrimeNet 2021-05-21, 21:30
Replies: 544
Views: 65,984
Posted By SethTro
This was fairly ugly but what I came up with ...

This was fairly ugly but what I came up with


# Anything within 200 lines of a F is less suspicious
cat JoshFamestad.txt | grep -C200 '\sF\s' > near_factor.txt

# List of not-near a F
grep...
Forum: PrimeNet 2021-05-21, 20:06
Replies: 544
Views: 65,984
Posted By SethTro
Got "lucky" and found two missed factor by my...

Got "lucky" and found two missed factor by my 20th test

M117689729 has a factor: 903349809610061326169 [TF:69:70:mfaktc 0.21 barrett76_mul32_gs]
M117688513 has a factor: 932172661536545550007...
Forum: PrimeNet 2021-05-21, 19:55
Replies: 544
Views: 65,984
Posted By SethTro
I finished the 67-68 bit factors and fond 142...

I finished the 67-68 bit factors and fond 142 missing factors. TJAOI had found all but four of these


M134320957 has a factor: 194664297858678306487 [TF:67:68:mfaktc 0.21 barrett76_mul32_gs]...
Forum: PrimeNet 2021-05-19, 19:17
Replies: 544
Views: 65,984
Posted By SethTro
I'm 30% done with the 67-68 bit range from...

I'm 30% done with the 67-68 bit range from JoshFamestad.txt and I've found 70 missing factors.

5 of these factors were unknown, in all those cases another factor was already known so 0 tests...
Forum: PrimeNet 2021-05-19, 00:55
Replies: 544
Views: 65,984
Posted By SethTro
I've found 5 missed factors. M134328289 has...

I've found 5 missed factors.

M134328289 has a factor: 186174198827254198783 [TF:67:68:mfaktc 0.21 barrett76_mul32_gs]
M139092743 has a factor: 233131765809191087687 [TF:67:68:mfaktc 0.21...
Forum: PrimeNet 2021-05-18, 20:27
Replies: 544
Views: 65,984
Posted By SethTro
Thanks James Looking at runs of NF/F I...

Thanks James


Looking at runs of NF/F I found these suspicious ranges



$ cat JoshFamestad.txt | sed -n -e 's/.*NF.*/NF/p' -e 's/\sF\s/&/p' | uniq -c

1 117681049 F ...
Forum: PrimeNet 2021-05-18, 19:18
Replies: 544
Views: 65,984
Posted By SethTro
cat JoshFamestad.txt | grep 'NF' | awk '{ print...

cat JoshFamestad.txt | grep 'NF' | awk '{ print "Factor=" $1, $8, $10 }' | sort -k 3 | sed 's/ 2\^/,/g' > test.txt

For TF=67-68, 14,860 Factor, 3,432.831 GHd

I queued these up as two days...
Forum: PrimeNet 2021-05-18, 18:21
Replies: 544
Views: 65,984
Posted By SethTro
I opened all of these results. For...

I opened all of these results.


For M134,000,000 and M139,000,000 missed results the user "Josh Famestad" was responsible at the TF range (67-68) with the missed factor.
A quick search of the...
Forum: Prime Gap Searches 2021-05-10, 20:50
Replies: 257
Sticky: Prime Gap News
Views: 57,277
Posted By SethTro
I added a new graph of record by year ...

I added a new graph of record by year

https://primegaps.cloudygo.com/graphs?max=100000&by_year

It's semi-uniform (some years focused on some intervals more than others) so no big surprised....
Forum: Prime Gap Searches 2021-05-06, 23:10
Replies: 37
Views: 2,844
Posted By SethTro
I coded up this and a lot more for `gap_stats`...

I coded up this and a lot more for `gap_stats` where I dynamical calculate the odds that each offset is part of a prime record. It was the next logical step in the optimization for me; technically...
Forum: Prime Gap Searches 2021-05-05, 08:43
Replies: 257
Sticky: Prime Gap News
Views: 57,277
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: 257
Sticky: Prime Gap News
Views: 57,277
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: 257
Sticky: Prime Gap News
Views: 57,277
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: 257
Sticky: Prime Gap News
Views: 57,277
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: 18,942
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: 640
Sticky: mersenne.ca
Views: 79,926
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: 640
Sticky: mersenne.ca
Views: 79,926
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: 257
Sticky: Prime Gap News
Views: 57,277
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: 257
Sticky: Prime Gap News
Views: 57,277
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: 18,942
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: 735
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...
Showing results 1 to 25 of 285

 
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