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-   Sierpinski/Riesel Base 5 (https://www.mersenneforum.org/forumdisplay.php?f=54)
-   -   S/R Base 5 Primes reported in 2017+ (https://www.mersenneforum.org/showthread.php?t=23446)

 rudy235 2019-06-21 23:15

[URL]https://primes.utm.edu/primes/page.php?id=126564[/URL]

88444 · 5[SUP]2799269[/SUP] - 1

1956611 digits Jun 2019

It is the largest SR5 prime and the third largest prime of 2019

it eliminates k=88444 from the base 5 Reisel Problem.

 pepi37 2019-06-25 08:07

And another hit :)

[url]https://primes.utm.edu/primes/page.php?id=126585[/url]

322498 · 52800819 - 1 is prime :)

 LaurV 2019-06-27 05:37

[QUOTE=pepi37;520028]
322498 · 52800819 (sic) - 1 is prime :)[/QUOTE]
That is divisible by 7 :razz:

 gd_barnes 2019-06-27 07:56

Pepi,

Please use the exponentiation symbol. Thanks.

 rudy235 2019-06-27 22:17

[QUOTE=gd_barnes;520164]Pepi,

Please use the exponentiation symbol. Thanks.[/QUOTE]

I never fail to do that,

 pepi37 2020-03-05 21:05

And new hit in SR5... prime will be verified soon :)

[url]https://primes.utm.edu/primes/page.php?id=130732[/url]

 axn 2020-03-10 09:50

Apparently there is another one?

[url]https://primes.utm.edu/primes/page.php?id=130751[/url]

146264*5^2953282-1

 JeppeSN 2020-03-14 10:25

And the third one of this month: 238694*5^2979422 - 1

[url]https://primes.utm.edu/primes/page.php?id=130771[/url]

/JeppeSN

 JeppeSN 2020-03-19 19:53

Fourth one, 207494*5^3017502 - 1.

[url]https://primes.utm.edu/primes/page.php?id=130783[/url]

/JeppeSN

 kar_bon 2020-05-04 21:45

Seems this was not reported here yet:

[url='https://primes.utm.edu/primes/page.php?id=130869']118568 * 5^3112069+1[/url] is prime, found on 2020-05-01

 rudy235 2022-02-18 22:12

[COLOR="Red"]Moderators: I am not too sure if this is the right (or best) thread to post this but please move it if required.[/COLOR]

A new Sierpinski/Riesel Base 5 has been found (verification pending)

#23 in the list currently 3622 · 5[SUP]7558139[/SUP] - 1
5282917 Digits L4965 (Ryan Propper) Feb 2022

This eliminates the smallest k in the list =3622 Riesel base 5

Congratulations to Ryan Propper.

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