Prime Gap News - Page 16

SethTro · 2020-10-06, 07:02

Quote:

Originally Posted by MJansen

Robert, I think you are right, the Mjansen and M Jansen (M if you separate by space) are gaps found by me. Seth can you change those to M.Jansen?

Kind regards
Michiel

I found 1223 records with MJansen instead of M.Jansen, I did not find any "M Jansen" Maybe those few records were replaced recently?

Either way I pushed new data to both repositories so these should be updated

https://primegap-list-project.github...p-discoverers/
and
https://primegap-list-project.github.io/graphs/jansenm/

SethTro · 2020-10-06, 08:10

I also found what I believe is an up-to-date list of gapcoin records and integrated merged those.

~150 new records (most are improvements to other gapcoin records)
40 new merit 30+ records

Quote:

Improved record 6678 merit=34.3775 found by Gapcoin
Improved record 6572 merit=33.8416 found by Gapcoin
Improved record 6494 merit=33.3730 found by Gapcoin
Improved record 6498 merit=32.6486 found by Gapcoin
Improved record 6504 merit=32.6313 found by Gapcoin
Improved record 6274 merit=32.2417 found by Gapcoin
Improved record 6368 merit=31.9905 found by Gapcoin
Improved record 6180 merit=31.8242 found by Gapcoin
Improved record 6304 merit=31.6092 found by Gapcoin
Improved record 6148 merit=31.5732 found by Gapcoin
Improved record 6126 merit=31.5540 found by Gapcoin
Improved record 6974 merit=31.4876 found by Gapcoin
Improved record 6950 merit=31.3923 found by Gapcoin
Improved record 6090 merit=31.3368 found by Gapcoin
Improved record 6078 merit=31.3074 found by Gapcoin
Improved record 6222 merit=31.2418 found by Gapcoin
Improved record 6056 merit=31.1423 found by Gapcoin
Improved record 6194 merit=31.0489 found by Gapcoin

SethTro · 2020-10-06, 08:24

Last post for the day

I got amazingly lucky that one of my first 30+ merit gaps was merit 37.05, making it top 5 merit at the time. RobSmith's recent submissions pushed it to 7th by finding a gap 58 longer!

Quote:

7 36760 PRP431 = 68569433*1021#/46410-19636 37.0850 Robert W. Smith [Dana Jacobsen]
8 36702 PRP431 = 164065661*1019#/7#-18566 37.0511 Seth Troisi

https://primegap-list-project.github...gaps-by-merit/

robert44444uk · 2020-10-06, 08:25

Quote:

Originally Posted by SethTro

I found 1223 records with MJansen instead of M.Jansen, I did not find any "M Jansen" Maybe those few records were replaced recently?

Either way I pushed new data to both repositories so these should be updated

https://primegap-list-project.github...p-discoverers/
and
https://primegap-list-project.github.io/graphs/jansenm/

The "M Jansen" records appear only as "M"

robert44444uk · 2020-10-06, 08:26

Quote:

Originally Posted by SethTro

Last post for the day

I got amazingly lucky that one of my first 30+ merit gaps was merit 37.05, making it top 5 merit at the time. RobSmith's recent submissions pushed it to 7th by finding a gap 58 longer!

https://primegap-list-project.github...gaps-by-merit/

That is sooo cool!

SethTro · 2020-10-07, 08:57

Since Robert pushed my record out of the top 5 I present

35308 100054841*953#/210-9670 Merit=38.05

https://github.com/primegap-list-pro...30076d8d571422

robert44444uk · 2020-10-07, 10:21

Quote:

Originally Posted by SethTro

Since Robert pushed my record out of the top 5 I present

35308 100054841*953#/210-9670 Merit=38.05

https://github.com/primegap-list-pro...30076d8d571422

Envy!

SethTro · 2020-10-14, 07:36

I wrote a program to perform much deeper trial division on the interval (https://github.com/sethtroisi/prime-gap-verify) and integrated it into the records server so it should verify new records almost twice as fast!

I also searched for the smallest improvements I could find

Code:

$ git log --pretty=oneline --grep='Improved' | cut -f1 -d' ' | cut -c1-8 | xargs -I{} sh -c 'echo "$(git show {} | grep "^[+-]INSERT" | cut -d, -f 8 | paste -s -d" \n" | awk "{print \$2 - \$1}" | sort | head -n 1)" - {}'

Code:

-INSERT INTO gaps VALUES(8738,0,'C','?','C','Jacobsen',2016,26.8880,142,'6401698391*331#/30 - 4196');
+INSERT INTO gaps VALUES(8738,0,'C','?','P','MJansen',2020,26.8885,142,'54504085*347#/30030-6336');
# 136753...240003<142 vs 136018...127199<142>


-INSERT INTO gaps VALUES(94992,0,'C','?','P','Jacobsen',2015,19.2713,2141,'239749*5003#/30 - 67516');
+INSERT INTO gaps VALUES(94992,0,'C','?','P','S.Troisi',2020,19.2732,2141,'1028687*5003#/7#-31826');
# Divisor of 210 vs 30

-INSERT INTO gaps VALUES(5386,0,'C','?','C','Gapcoin',2014,27.7495,85,'1966630484318698861668498612811408901881803404485166080977579161864330281129190669803');
+INSERT INTO gaps VALUES(5386,0,'C','?','P','Gapcoin',2020,27.7498,85,'1963248243263300434282228442782422732294415751243892273508732840983627272810898907777');

SethTro · 2020-10-15, 07:44

Quote:

Originally Posted by mart_r

Something I've been wanting to ask years ago: there are still a couple of gaps from Patrick DeGeest's project (largest/smallest PRPs with d digits, also called "border PRPs") that are not included in the GitHub lists. I don't know whether someone is in contact with him to ask for inclusion of those gaps, or to include them anyway from the openly accessible data (I could make a list if need be), or to let it be anyone's concern...

http://www.worldofnumbers.com/borderprp.htm

I worked on this. 5 improvements and 3290 new records with gaps (121138 to 1682776).

Can someone validate I understand the discoverer line?
"PDG (- 8 maa 2016) | ET (+ 10/2012 vb PDG 6 nov 2012)"

I take this to mean that PDG (Patrick De Geest) found the lower prime on 8th march(?) (may?) 2016 and ET (Edward Trice) found the next prime 10/2012 and it was verified by PDG 6th nov 2012.

if next and previous discoverer are the same person it's obvious what to do (use their name at the later date). Any suggestions for how to credit it when the record was found by two people?

SethTro · 2020-10-15, 09:00

Can I get an LGTM for adding these lines to credit

Code:

INSERT INTO credits VALUES('Gramolin','Alexander Gramolin', 'BorderPRP coordinated by Patrick De Geest', 'Alexander Gramolin [BorderPRP]');
INSERT INTO credits VALUES('P.Kaiser','Peter Kaiser', 'BorderPRP coordinated by Patrick De Geest', 'Peter Kaiser [BorderPRP]')

robert44444uk · 2020-10-15, 11:33

Quote:

Originally Posted by SethTro

Can I get an LGTM for adding these lines to credit

Code:

INSERT INTO credits VALUES('Gramolin','Alexander Gramolin', 'BorderPRP coordinated by Patrick De Geest', 'Alexander Gramolin [BorderPRP]');
INSERT INTO credits VALUES('P.Kaiser','Peter Kaiser', 'BorderPRP coordinated by Patrick De Geest', 'Peter Kaiser [BorderPRP]')

LGTM :)

2020-10-07, 08:57	#171
SethTro "Seth" Apr 2019 2·5³ Posts	Lightning strikes twice Since Robert pushed my record out of the top 5 I present 35308 100054841*953#/210-9670 Merit=38.05 https://github.com/primegap-list-pro...30076d8d571422

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