20190604, 14:14  #56  
Nov 2016
2^{2}·691 Posts 
Kar_bon, there are many known primes of the form (b+1)*b^n+1 and b^n+(b+1) for b<=16 that are not currently in the corresponding OEIS sequence, thus you can extend these OEIS sequences:
Quote:
Also, you can extended the sequence A122396 (exactly the Williams primes MM with prime b) up to n=50 and A087139 (exactly the Williams MP with prime b) up to n=91. (e.g. A087139(54) = 102979, since (2511)*251^102978+1 is prime, and this number equals 251^102979  251^102978 + 1) Last fiddled with by kar_bon on 20190606 at 08:35 Reason: table 

20190604, 21:26  #57 
Feb 2019
3^{4} Posts 
https://www.rieselprime.de/ziki/Williams_prime_PP_3
Just wanted to let you know that I'm still searching on the numbers above. I already finished to n=800k without new primes. 
20190604, 22:10  #58  
Mar 2006
Germany
5462_{8} Posts 
Quote:


20190605, 08:06  #59 
Mar 2006
Germany
101100110010_{2} Posts 
@sweety439:
Plases do me a favour: Take a range or a dozen bases, test them to n=10k, attach a file with the primes with the range done. I will not update the Wiki every day for your small primes and no searched range given. For example the next prime for MM 126 is less 10000. Last fiddled with by kar_bon on 20190606 at 08:32 Reason: addressed 
20190605, 08:11  #60 
Mar 2006
Germany
2866_{10} Posts 
I've included a separate page for all remaining data for Williams primes (for now only MMtype).
Listed are all bases b < 2050 not yet available as own page and nmax=1000 or given range. 
20190606, 07:14  #61 
Mar 2006
Germany
5462_{8} Posts 
@sweety439
I've deleted your posts with results here! This is the thread for the Wiki not for your results. Please post those in your own threads. 
20190609, 00:02  #62 
Nov 2016
2^{2}×691 Posts 
In the page Proth prime small bases least n, the data is not correct: the forms 2*512^n+1, 4*32^n+1, 4*512^n+1, 4*1024^n+1, 10*1000^n+1 and 12*12^n+1 may have primes, since it is not known whether there are Fermat primes > 2^(2^4)+1, etc. (all these numbers are generalized Fermat numbers). (Note that such forms do not include 8*128^n+1, 8*128^n+1 have no possible primes)
Also, recently a prime 7*1004^54848+1 was found, please add it. 
20190609, 00:10  #63 
Nov 2016
ACC_{16} Posts 
There are other sequences for Riesel/Proth prime small bases least n: (not only A119591 and A253178)
A119624 (Proth k=2, 0 for bases with no possible prime) A088782 (Proth k=10, 0 for bases with no possible prime) A098873 (Riesel k=2 for bases divisible by 6) A098872 (Proth k=2 for bases divisible by 6) A098876 (Riesel k=3 for bases divisible by 6) A098877 (Proth k=3 for bases divisible by 6) Last fiddled with by sweety439 on 20190609 at 00:11 
20190610, 14:39  #64 
"Will Conway"
May 2018
UK
2^{6} Posts 
Is it possible for you to add Operation Billion Digits as a project on the wiki?I can’t seem to find any mention of it.
Last fiddled with by WGJC3107 on 20190610 at 14:39 
20190610, 15:25  #66 
"Will Conway"
May 2018
UK
2^{6} Posts 
Thanks, I didn’t realise there was a page there.
Is it possible for me to make an account on there to edit pages or is that just admin’s job? 
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