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 Showing results 1 to 25 of 1000 Search took 0.21 seconds. Search: Posts Made By: sweety439
 Forum: sweety439 2020-10-22, 14:59 Replies: 1,069 Views: 35,503 Posted By sweety439 For the Riesel bases 2<=b<=128 and b = 256, 512,... For the Riesel bases 2<=b<=128 and b = 256, 512, 1024: proven: 4, 5, 7 (with PRP), 8, 9, 10, 11, 12, 13, 14, 16, 17, 18, 19, 20, 21, 23, 25, 26, 27, 29, 32, 34, 35, 37, 38, 39, 41, 44, 45, 47, 49,...
 Forum: sweety439 2020-10-22, 14:48 Replies: 1,069 Views: 35,503 Posted By sweety439 For the Sierpinski bases 2<=b<=128 and b = 256,... For the Sierpinski bases 2<=b<=128 and b = 256, 512, 1024: proven: 4, 5, 7, 8, 9, 11, 13, 14, 16, 17, 19, 20, 21, 23, 27, 29, 34, 35, 39, 41, 43, 44, 45, 47, 49, 51, 54, 56, 57, 59, 61, 64, 65,...
 Forum: Conjectures 'R Us 2020-10-22, 07:52 Replies: 17 Views: 1,666 Posted By sweety439 Is srsieve2 updated? If so, can you use it to... Is srsieve2 updated? If so, can you use it to reserve the S3 problem in Sierpinski conjectures and proofs...
 Forum: Cunningham Tables 2020-10-22, 06:36 Replies: 188 Views: 20,053 Posted By sweety439 Why 10^371+-1 are factored earlier than... Why 10^371+-1 are factored earlier than 10^365+-1? eulerphi(371) = 312 > 288 = eulerphi(365)
 Forum: sweety439 2020-10-21, 17:15 Replies: 43 Views: 4,170 Posted By sweety439 Although the test limit of all families in... Although the test limit of all families in https://github.com/RaymondDevillers/primes are all 10K, but some families are in fact already tested to much higher.... Base 25: EF{O}, 366*25^n-1:...
 Forum: sweety439 2020-10-21, 16:06 Replies: 43 Views: 4,170 Posted By sweety439 Some minimal (probable) primes with bases... Some minimal (probable) primes with bases 28<=b<=50 not shown in https://github.com/RaymondDevillers/primes: (and hence some unsolved families can be removed) Base 37: (families FY{a} and R8{a}...
 2020-10-21, 15:37 Replies: 90 Views: 85,847 Posted By sweety439 2^unknown+79309 2^9+79817 2^42210+91549 (PRP)... 2^unknown+79309 2^9+79817 2^42210+91549 (PRP) 2^394+131179 2^21+152267 2^1032+156511 2^57+163187 2^1038+200749 2^44+202705 2^16+209611
 Forum: sweety439 2020-10-20, 16:26 Replies: 43 Views: 4,170 Posted By sweety439 The "minimal prime problem" is solved only in... The "minimal prime problem" is solved only in bases 2~16, 18, 20, 22~24, 30, 42, and maybe 60 b, length of largest minimal prime base b, number of minimal primes base b 2, 2, 2 3, 3, 3 4, 2,...
 Forum: sweety439 2020-10-20, 15:49 Replies: 43 Views: 4,170 Posted By sweety439 Base 27: 8{0}9A: 5832*27^n+253 999{G}:... Base 27: 8{0}9A: 5832*27^n+253 999{G}: (88577*27^n-8)/13 C{L}E: (8991*27^n-203)/26 E{I}F8: (139239*27^n-1192)/13 {F}9FM: (295245*27^n-113557)/26 Base 48:
 Forum: Prime Wiki 2020-10-20, 14:11 Replies: 214 Sticky: Prime-Wiki Views: 19,579 Posted By sweety439 4*230^n+1 at n=1M with no prime found... 4*230^n+1 at n=1M with no prime found (https://mersenneforum.org/showpost.php?p=560395&postcount=852)
 Forum: sweety439 2020-10-20, 13:31 Replies: 43 Views: 4,170 Posted By sweety439 Base 25: F{O}KO: 9375*25^n+524 FO{K}O:... Base 25: F{O}KO: 9375*25^n+524 FO{K}O: (56375*25^n+19)/6 LO{L}8: (109975*25^n-111)/8 [need not to be searched if a smaller prime for the "O{L}8: (4975*25^n-111)/8" family were found] M{1}F1:...
 Forum: sweety439 2020-10-20, 12:48 Replies: 43 Views: 4,170 Posted By sweety439 Base 35: 6W{P}4: (288855*35^n-739)/34 [need... Base 35: 6W{P}4: (288855*35^n-739)/34 [need not to be searched if a smaller prime for the "W{P}4: (38955*35^n-739)/34" family were found] F8{0}F9: 652925*35^n+534 {Y}PO: 1225*35^n-326 FQ{F}I:...
 Forum: sweety439 2020-10-20, 12:35 Replies: 43 Views: 4,170 Posted By sweety439 Base 31: ILE{L}: (179637*31^n-7)/10 [need... Base 31: ILE{L}: (179637*31^n-7)/10 [need not to be searched if a smaller prime for the "IE{L}: (5727*31^n-7)/10" family were found] L{F}G: (1333*31^n+1)/2 [need not to be searched if a smaller...
 2020-10-20, 12:09 Replies: 90 Views: 85,847 Posted By sweety439 For the dual Sierpinski problem for... For the dual Sierpinski problem for 78557
 Forum: sweety439 2020-10-19, 15:47 Replies: 1,069 Views: 35,503 Posted By sweety439 At n=26544, found a new (probable) prime:... At n=26544, found a new (probable) prime: (376*70^24952-1)/3
 Forum: sweety439 2020-10-19, 15:45 Replies: 2 Views: 66 Posted By sweety439 757 757 is irregular prime 757 is de Polignac number (cannot be written as 2^n+p with prime p) 757 is the smallest prime p such that 1/p has period length 3^3 (in decimal) The smallest n such that...
 Forum: sweety439 2020-10-18, 13:39 Replies: 43 Views: 4,170 Posted By sweety439 Unsolved families: Base 17: F1{9}:... Unsolved families: Base 17: F1{9}: (4105*17^n-9)/16 Base 19: EE1{6}: (15964*19^n-1)/3
 Forum: Lounge 2020-10-18, 10:25 Replies: 30 Views: 3,313 Posted By sweety439 There is a problem, the minimal set of the... There is a problem, the minimal set of the strings for primes with at least two digits in base b: https://primes.utm.edu/glossary/page.php?sort=MinimalPrime In 1996, Jeffrey Shallit [Shallit96]...
 2020-10-18, 09:25 Replies: 10 Views: 2,160 Posted By sweety439 https://oeis.org/A085398/b085398_2.txt https://oeis.org/A085398/b085398_2.txt
 Forum: Prime Wiki 2020-10-18, 09:00 Replies: 214 Sticky: Prime-Wiki Views: 19,579 Posted By sweety439 80*81^5394+1, the second Williams MP prime base... 80*81^5394+1, the second Williams MP prime base 81 (the first is 80*81^1+1) Done for 80*3^n+1 instead.
 Forum: sweety439 2020-10-18, 07:20 Replies: 1,069 Views: 35,503 Posted By sweety439 Also all k-values such that numerator(k*b^n+-1)... Also all k-values such that numerator(k*b^n+-1) (+ for Sierpinski, - for Riesel) divides (b-1)*b^r for some (positive or negative or 0) integer n and (positive or 0) integer r
 Forum: sweety439 2020-10-18, 07:17 Replies: 1,069 Views: 35,503 Posted By sweety439 This also including all k-values such that k+-1... This also including all k-values such that k+-1 (+ for Sierpinski, - for Riesel) divides (b-1)*b^r for some r
 Forum: sweety439 2020-10-18, 02:54 Replies: 1,069 Views: 35,503 Posted By sweety439 No other (probable) primes found for R70 k = 376,... No other (probable) primes found for R70 k = 376, 496, 811 up to n=22813
 Forum: sweety439 2020-10-17, 09:38 Replies: 1 Views: 53 Posted By sweety439 M5 = 31, M7 = 127, W5 = 11, W7 = 43 It is... M5 = 31, M7 = 127, W5 = 11, W7 = 43 It is known that MM5, MM7, WW5, WW7 are primes However, MMM5 and WWW5 are both known to be composite Two open problems: Is MMM7 prime? Is WWW7 prime? I...
 Forum: sweety439 2020-10-17, 06:55 Replies: 1 Views: 53 Posted By sweety439 Some notable smallest repunit/nexus prime Let a(b) = Smallest prime p such that the generalized repunit number (b^p-1)/(b-1) is prime b(p) = Smallest base b such that the generalized repunit number (b^p-1)/(b-1) is prime c(b) = Smallest...
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