mersenneforum.org

mersenneforum.org (https://www.mersenneforum.org/index.php)
-   Riesel Prime Search (https://www.mersenneforum.org/forumdisplay.php?f=59)
-   -   POST LOTS AND LOTS OF PRIMES HERE (https://www.mersenneforum.org/showthread.php?t=13180)

rudy235 2020-03-03 09:53

This one has not been yet verified but it looks genuine.

[SIZE="3"]6962 · 31[SUP]2863120[/SUP] - 1[/SIZE]

4269952 Digits. Largest of the year. Will rank 20 if verified.

[URL="https://primes.utm.edu/primes/page.php?id=130702"]https://primes.utm.edu/primes/page.php?id=130702[/URL]

paulunderwood 2020-03-03 10:27

[QUOTE=rudy235;538794]This one has not been yet verified but it looks genuine.

[SIZE="3"]6962 · 31[SUP]2863120[/SUP] - 1[/SIZE]

4269952 Digits. Largest of the year. Will rank 20 if verified.

[URL="https://primes.utm.edu/primes/page.php?id=130702"]https://primes.utm.edu/primes/page.php?id=130702[/URL][/QUOTE]

This is not strictly a Riesel Prime Search prime which have b=2 and k<300 (?). Nevertheless, it is a great achievement by CRUS.

rudy235 2020-03-03 21:16

[QUOTE=paulunderwood;538799]This is not strictly a Riesel Prime Search prime which have b=2 and k<300 (?). Nevertheless, it is a great achievement by CRUS.[/QUOTE]

You are totally right!:smile: It might be posted somewhere else? Any suggestions?

pinhodecarlos 2020-03-03 21:20

[QUOTE=rudy235;538830]You are totally right!:smile: It might be posted somewhere else? Any suggestions?[/QUOTE]

[url]https://www.mersenneforum.org/showthread.php?t=6374&page=18[/url]

kar_bon 2020-03-11 11:33

[QUOTE=Cruelty;537960]Solid 11 years :smile: This is quite "heavy" k.[/QUOTE]

It's quite more than 11 years now: I've included the primes found from the older primes thread with post links in the Wiki and your first found for [url='https://www.rieselprime.de/ziki/Riesel_prime_25']k=25[/url] was in 2006!

matzetoni 2020-06-17 20:01

discovered my first mega prime with help of the PG sieve file

[B]3329 · 2[SUP]3388472[/SUP] - 1[/B]

is [URL="https://primes.utm.edu/primes/page.php?id=130974"]prime[/URL]! (1,020,036 digits) :jvang:

Really lucky there, I began testing at exponent 3,330,000 about a month ago.

kar_bon 2020-06-18 06:43

You tested only k=3329 from n=3330000?
For a Nash weight that low you tested only 516 n-values to find such prime. Lucky hit.

matzetoni 2020-06-18 10:24

[QUOTE]You tested only k=3329 from n=3330000?
For a Nash weight that low you tested only 516 n-values to find such prime. Lucky hit. [/QUOTE]I had testing going on for 6 different k's, so I tested more like 3000-4000 candidates overall, still very lucky find. I was also surprised to find a prime with the k that had the lowest weight of these 6 k's.

carpetpool 2020-07-12 05:22

273*2^2024810-1 is prime! (609531 decimal digits) Time : 1198.071 sec.

Thomas11 2020-07-13 14:05

233*2^2426512-1 (730456 digits)

VBCurtis 2020-08-18 16:32

99*2^3026660-1 (911118 digits)
99*2^3029959-1 (912111 digits)

pinhodecarlos 2020-08-18 17:11

[QUOTE=VBCurtis;554150]99*2^3026660-1 (911118 digits)
99*2^3029959-1 (912111 digits)[/QUOTE]

Wow!

pepi37 2020-08-18 17:49

[QUOTE=VBCurtis;554150]99*2^3026660-1 (911118 digits)
99*2^3029959-1 (912111 digits)[/QUOTE]

Nice double luck!
Congratulations

kuratkull 2020-11-04 06:56

[FONT=Courier New]195*2^4373994-1 is prime! (1316706 digits)[/FONT]

[URL]https://primes.utm.edu/primes/page.php?id=131376[/URL]

Non-essential fun facts:
1) k=195 is the highest Nash weight k in RSP k<300, with a weight of 4106, followed by k=45 at weight 3747.
2) The last prime for k=195 was for n=1983875, found in 2014 by Peter Benson
3) My first prime since Aug 2008 (152521 digits) - i took a ca. 11 year hiatus from prime searching
4) First prime since I restarted prime searching in summer/autumn 2019, was really waiting for this
5) My first megaprime

pepi37 2020-11-04 21:27

[QUOTE=kuratkull;562148][FONT=Courier New]195*2^4373994-1 is prime! (1316706 digits)[/FONT]

[URL]https://primes.utm.edu/primes/page.php?id=131376[/URL]

Non-essential fun facts:
1) k=195 is the highest Nash weight k in RSP k<300, with a weight of 4106, followed by k=45 at weight 3747.
2) The last prime for k=195 was for n=1983875, found in 2014 by Peter Benson
3) My first prime since Aug 2008 (152521 digits) - i took a ca. 11 year hiatus from prime searching
4) First prime since I restarted prime searching in summer/autumn 2019, was really waiting for this
5) My first megaprime[/QUOTE]


So at the end effort was rewarded!
Congratulations!

Thomas11 2020-11-12 15:44

From our 1st megabit drive:

111*2^3060238-1 (921226 digits)
65*2^3080952-1 (927461 digits)
57*2^3093440-1 (931220 digits)

Cruelty 2021-01-26 12:00

25*2^5658915-1 is prime! (1703505 decimal digits)

Trilo 2021-02-11 04:58

55*2^2048305-1 is prime! (627441 digits)

Happy5214 2021-02-11 06:55

[QUOTE=Trilo;571293]55*2^2048305-1 is prime! (627441 digits)[/QUOTE]
That range was already tested by Kosmaj. Luckily I found it on [URL="https://primes.utm.edu/primes/page.php?id=131830"]PrimePages[/URL]. It's 55*2^20[B]84[/B]305-1.

kuratkull 2021-03-06 09:13

[CODE]195*2^4685711-1 is prime! (1410542 decimal digits)[/CODE]

[url]https://primes.utm.edu/primes/page.php?id=132121[/url]

k<300 highest Nash weight k delivers again.

pepi37 2021-03-06 19:32

[QUOTE=kuratkull;573089][CODE]195*2^4685711-1 is prime! (1410542 decimal digits)[/CODE][URL]https://primes.utm.edu/primes/page.php?id=132121[/URL]

k<300 highest Nash weight k delivers again.[/QUOTE]


Congratulations!

gd_barnes 2021-03-18 08:38

285*2^1801236-1 is prime

VBCurtis 2021-04-05 17:41

Been a while:
99*2^2658496-1 is prime! (800290 digits)

gd_barnes 2021-04-12 05:34

From the 3rd megabit drive:

257*2^2108554-1 is prime :-)


All times are UTC. The time now is 12:22.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.