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 Showing results 1 to 25 of 43 Search took 0.01 seconds. Search: Posts Made By: sweety439
 Forum: Conjectures 'R Us 2019-06-10, 13:07 Replies: 115 Views: 38,753 Posted By sweety439 Since all Sierp bases <= 1030 have a k=7 prime,... Since all Sierp bases <= 1030 have a k=7 prime, thus I try to find the smallest Sierp base without known prime for k=7 and continue searched Sierp k=7 for larger bases (b>1030) and find such Sierp...
 Forum: Conjectures 'R Us 2019-06-09, 01:14 Replies: 115 Views: 38,753 Posted By sweety439 Great!!! Now there are no remain bases for Sierp... Great!!! Now there are no remain bases for Sierp k=7!!! Besides, how about reserving 2*801^n+1, the only form only searched to n=25K for Sierp k=2.
 Forum: Conjectures 'R Us 2019-06-07, 21:24 Replies: 115 Views: 38,753 Posted By sweety439 So you can add the prime 8*997^15814-1 in the... So you can add the prime 8*997^15814-1 in the CRUS page, currently R997 is only tested to n=10K.
 Forum: Conjectures 'R Us 2019-04-11, 16:52 Replies: 115 Views: 38,753 Posted By sweety439 Are there any update of these files? e.g.... Are there any update of these files? e.g. recently the prime 8*410^279991+1 (for Sierpinski k=8) was found.
 Forum: Conjectures 'R Us 2018-06-20, 18:48 Replies: 115 Views: 38,753 Posted By sweety439 8*728^7399+1 is prime. 8*728^7399+1 is prime.
 Forum: Conjectures 'R Us 2018-06-07, 03:06 Replies: 115 Views: 38,753 Posted By sweety439 Currently at: Riesel k=8: n=6632 Riesel... Currently at: Riesel k=8: n=6632 Riesel k=9: n=8346 Riesel k=10: n=7750 Riesel k=11: n=11009 Riesel k=12: n=9840 Sierp k=8: n=6599 Sierp k=9: n=10619 Sierp k=10: n=6196
 Forum: Conjectures 'R Us 2018-06-07, 03:02 Replies: 115 Views: 38,753 Posted By sweety439 8*854^6500-1 is prime. 8*854^6500-1 is prime.
 Forum: Conjectures 'R Us 2018-06-06, 17:41 Replies: 115 Views: 38,753 Posted By sweety439 12*826^5786+1 is prime. 12*826^5786+1 is prime.
 Forum: Conjectures 'R Us 2018-06-05, 21:32 Replies: 115 Views: 38,753 Posted By sweety439 Now I reserve all bases for k = 8 to 12 that are... Now I reserve all bases for k = 8 to 12 that are at n<25K to n=25K and found that 8*284^5266-1 and 10*1020^6944-1 are primes. (using pfgw) Current at: Riesel k=8: n=6144 Riesel k=9: n=7445...
 Forum: Conjectures 'R Us 2017-10-30, 19:32 Replies: 115 Views: 38,753 Posted By sweety439 The exclusions are: Riesel k=2: none ... The exclusions are: Riesel k=2: none Riesel k=3: b==(1 mod 2); factor of 2 Riesel k=4:
 Forum: Conjectures 'R Us 2017-10-30, 14:21 Replies: 115 Views: 38,753 Posted By sweety439 Update current file. Update current file.
 Forum: Conjectures 'R Us 2017-08-21, 02:04 Replies: 115 Views: 38,753 Posted By sweety439 2*801^n+1 is currently at n=28661, and 7*1004^n+1... 2*801^n+1 is currently at n=28661, and 7*1004^n+1 is currently at n=31030, both no primes found. Many of the bases for 8<=k<=12 are only searched to n=5K, I will reserve all such bases to n=25K.
 Forum: Conjectures 'R Us 2017-08-21, 01:58 Replies: 115 Views: 38,753 Posted By sweety439 12*312^21162+1 is prime. Result text file... 12*312^21162+1 is prime. Result text file attached.
 Forum: Conjectures 'R Us 2017-08-16, 17:58 Replies: 115 Views: 38,753 Posted By sweety439 I am now reserving 2*801^n+1, 7*1004^n+1,... I am now reserving 2*801^n+1, 7*1004^n+1, 10*449^n+1 and 12*312^n+1 and found that 10*449^18506+1 is prime. (2*801^n+1 is currently at n=26600, 7*1004^n+1 is currently at n=28374, and 12*312^n+1 is...
 Forum: Conjectures 'R Us 2017-03-10, 19:10 Replies: 115 Views: 38,753 Posted By sweety439 @Gary, your text file for n > 5K for Riesel k=10... @Gary, your text file for n > 5K for Riesel k=10 is not right, 10*992^5443-1 is not prime, it is divisible by 7.
 Forum: Conjectures 'R Us 2017-02-09, 15:49 Replies: 115 Views: 38,753 Posted By sweety439 There is a research for k=2 and some... There is a research for k=2 and some Sierpinski/Riesel bases (including some bases b>1030): http://mersenneforum.org/showthread.php?t=6918
 Forum: Conjectures 'R Us 2017-02-01, 15:43 Replies: 115 Views: 38,753 Posted By sweety439 Also, for the "number of remaining k's" column of... Also, for the "number of remaining k's" column of the text files for the remain bases, why 7*1004^n+1 and 10*1004^n+1 lists 3k, but 2*1004^n+1 lists 1k? As you say, S1004 should list 3k since k=2, 7...
 Forum: Conjectures 'R Us 2017-02-01, 13:34 Replies: 115 Views: 38,753 Posted By sweety439 Found an additional exclusion: Riesel k=12:... Found an additional exclusion: Riesel k=12: base 307 has a covering set of [5, 11, 29] Thus, there are only 6 bases remain for Riesel k=12: 263, 593, 615, 717, 912, 978.
 Forum: Conjectures 'R Us 2017-01-20, 16:13 Replies: 115 Views: 38,753 Posted By sweety439 Some additional exclusions for k<=12 and b<=2048:... Some additional exclusions for k<=12 and b<=2048: Riesel k=6: all bases b=6*m^2 and m = 2 or 3 mod 5 can be proven composite by partial algebra factors. (this includes bases 24, 54, 294, 384, 864,...
 Forum: Conjectures 'R Us 2016-12-06, 12:22 Replies: 115 Views: 38,753 Posted By sweety439 Like my research for Riesel k=15, there are 4... Like my research for Riesel k=15, there are 4 situations: (1)b%7=6, b%113=98, b%17=2, b%1489=15 The smallest such b is 12196414. (2)b%7=6, b%113=98, b%17=15, b%1489=200 The smallest such...
 Forum: Conjectures 'R Us 2016-12-06, 12:10 Replies: 115 Views: 38,753 Posted By sweety439 For Riesel k=7, there are 8 situations: (1)... For Riesel k=7, there are 8 situations: (1) b%3=2, b%5=3, b%1201=1194, b%17=10, b%169553=7 (2) b%3=2, b%5=3, b%1201=1194, b%17=7, b%169553=169546 (3) b%3=2, b%5=3, b%1201=7, b%17=11,...
 Forum: Conjectures 'R Us 2016-12-05, 16:57 Replies: 115 Views: 38,753 Posted By sweety439 Besides, do you miss any primes (that were found... Besides, do you miss any primes (that were found recently)? At beginning, you missed two primes: 4*737^269302+1 and 4*72^1119849-1. I don't know whether you miss other primes.
 Forum: Conjectures 'R Us 2016-12-05, 14:03 Replies: 115 Views: 38,753 Posted By sweety439 The files are not right: 10*611^n-1 (R611, k=10)... The files are not right: 10*611^n-1 (R611, k=10) is already tested to n=200K, not just 5K. Besides, why the "number of remaining k's" column of 7*1004^n+1 lists 2k, but that of 10*1004^n+1 lists...
 Forum: Conjectures 'R Us 2016-12-05, 12:51 Replies: 115 Views: 38,753 Posted By sweety439 Thanks very much! Thanks very much!
 Forum: Conjectures 'R Us 2016-12-02, 19:46 Replies: 115 Views: 38,753 Posted By sweety439 These are the Sierpinski k=12 primes up to b=1030. These are the Sierpinski k=12 primes up to b=1030.
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