20190420, 03:48  #1  
Mar 2006
Germany
3^{2}·5^{2}·13 Posts 
This thread is for results posted in this subforum but should belong to their own topics!
DO NOT POST YOUR RESULTS HERE!  Quote:
Last fiddled with by kar_bon on 20201202 at 01:05 

20190723, 20:21  #2 
Feb 2019
7×13 Posts 
update on 4*3^n+1 sequence
See here:
https://www.mersenneforum.org/showpo...&postcount=150 search will of course continue after I reach n=1M. Last fiddled with by matzetoni on 20190723 at 20:21 
20190804, 04:14  #3 
"99(4^34019)99 palind"
Nov 2016
(P^81993)SZ base 36
5·13·47 Posts 
Currently Williams MM 268 was tested to n=400K with no prime found, see CRUS.
Done. Last fiddled with by kar_bon on 20190805 at 06:57 Reason: Done 
20190927, 16:00  #4 
"99(4^34019)99 palind"
Nov 2016
(P^81993)SZ base 36
5·13·47 Posts 
See post https://mersenneforum.org/showpost.p...&postcount=760, 4*789^149139+1 is prime, you can update it to https://www.rieselprime.de/ziki/Prot..._bases_least_n

20191001, 19:03  #5 
"99(4^34019)99 palind"
Nov 2016
(P^81993)SZ base 36
5·13·47 Posts 
5*326^400785+1 is also prime.

20191107, 20:28  #6 
"99(4^34019)99 palind"
Nov 2016
(P^81993)SZ base 36
5×13×47 Posts 
Searched "Williams PP" (b+1)*b^n+1 for all 2<=b<=12^3 and 1<=n<=12^3
All numbers in this file are written in duodecimal, not including b = 1 mod 3 since for these b, all such numbers are divisible by 3 Currently, I am also running Williams MM, MP and PP for all 2<=b<=12^3 and 1<=n<=12^3 
20191107, 20:41  #7 
"99(4^34019)99 palind"
Nov 2016
(P^81993)SZ base 36
BEF_{16} Posts 
I also searched 2*b^n1 (Riesel k=2), 2*b^n+1 (Proth k=2), 3*b^n1 (Riesel k=3) and 3*b^n+1 (Proth k=3) for 2<=b<=12^3 and 1<=n<=12^3, all numbers in these text files are written in duodecimal

20191107, 20:44  #8  
"99(4^34019)99 palind"
Nov 2016
(P^81993)SZ base 36
5757_{8} Posts 
Quote:


20191109, 01:29  #9 
"99(4^34019)99 palind"
Nov 2016
(P^81993)SZ base 36
5×13×47 Posts 

20191110, 01:22  #10 
"99(4^34019)99 palind"
Nov 2016
(P^81993)SZ base 36
BEF_{16} Posts 
Well, I updated these two files for Williams MP for bases 1025<=b<=2049 (only searched to n=1024) in October, both are in decimal notation, why you deleted them?
Last fiddled with by sweety439 on 20191110 at 01:23 
20191114, 11:52  #11 
"99(4^34019)99 palind"
Nov 2016
(P^81993)SZ base 36
5×13×47 Posts 
Williams MM 268 has searched by CRUS to n=400K, but currently the "Notes" for the page https://www.rieselprime.de/ziki/Williams_prime_MM_least only show "Base 268: Conjectures 'R Us at 100k", it should be "Base 268: Conjectures 'R Us at 400k" (this base is only searched to 200K in the page http://harvey563.tripod.com/wills.txt), also, for Williams MM 478, R478 is started for CRUS: see post https://mersenneforum.org/showpost.p...postcount=1983

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