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 Showing results 1 to 25 of 1000 Search took 0.30 seconds. Search: Posts Made By: sweety439
 Forum: sweety439 2022-08-10, 18:56 Replies: 369 Views: 49,583 Posted By sweety439 For the smallest flexible primes base b with... For the smallest flexible primes base b with given d dividing b-1: 4,3,2 5,4,2 6,5,2 7,3,3 7,6,2 8,7,3 9,4,2
 Forum: FactorDB 2022-08-10, 15:44 Replies: 571 Views: 108,178 Posted By sweety439 I found two differences: 1. See... I found two differences: 1. See https://archive.ph/ayAkD and https://archive.ph/jt0sk, there is an additional “Tests” column 2. See https://archive.ph/K22Dc and https://archive.ph/Z2Kut, some...
 Forum: FactorDB 2022-08-10, 15:39 Replies: 571 Views: 108,178 Posted By sweety439 It seems to be this number... It seems to be this number (http://factordb.com/index.php?id=1100000000646133808), with 23770 digits
 Forum: sweety439 2022-08-09, 13:45 Replies: 13 Views: 525 Posted By sweety439 For odd prime q, 2^q-1 is Phi(q,2), and (2^q+1)/3... For odd prime q, 2^q-1 is Phi(q,2), and (2^q+1)/3 is Phi(2*q,2), and p divides Phi(n,2) if and only if order(2,p) = n, and order(2,p) = 2 if and only if (p-1)/n is the largest m dividing p-1 such...
 Forum: sweety439 2022-08-08, 17:22 Replies: 1,276 Views: 108,759 Posted By sweety439 S25 k=71 at n=24K, no prime or PRP found S25 k=71 at n=24K, no prime or PRP found
 Forum: sweety439 2022-08-08, 13:27 Replies: 13 Views: 525 Posted By sweety439 this page for New Mersenne Conjecture... this page for New Mersenne Conjecture (http://www.hoegge.dk/mersenne/NMC.html) needs to be updated
 Forum: Software 2022-08-08, 12:15 Replies: 7 Views: 221 Posted By sweety439 This is indeed the P+1 integer factorization... This is indeed the P+1 integer factorization method, click the link in my post #2 to see what is this
 Forum: Software 2022-08-08, 11:31 Replies: 7 Views: 221 Posted By sweety439 Do you mean N+1 primality proving method... Do you mean N+1 primality proving method (https://primes.utm.edu/prove/prove3_2.html) or P+1 integer factorization method (https://en.wikipedia.org/wiki/Williams%27s_p_%2B_1_algorithm)?
 Forum: Aliquot Sequences 2022-08-07, 08:29 Replies: 3,698 Views: 442,560 Posted By sweety439 Now 276 is at index 2140 with size 213 Now 276 is at index 2140 with size 213
 Forum: sweety439 2022-08-07, 03:05 Replies: 1,276 Views: 108,759 Posted By sweety439 All 1k bases (I have a plan to reserve all of... All 1k bases (I have a plan to reserve all of them to 20K+ or 30K+) base remain k test limit of n S12 12 33.55M S18 18 33.55M S25 71 10K S32 4 1.717G S37 37 524K...
 Forum: sweety439 2022-08-07, 02:46 Replies: 1,276 Views: 108,759 Posted By sweety439 S103 k=7 at n=22000, no primes or PRPs S103 k=7 at n=22000, no primes or PRPs
 Forum: sweety439 2022-08-06, 14:22 Replies: 13 Views: 525 Posted By sweety439 See https://oeis.org/A005849, the numbers n such... See https://oeis.org/A005849, the numbers n such that n*2^n+1 is prime (Cullen prime), there is no single known prime term, even worse, all known terms except 1 and 6611 are divisible by either 2 or...
 Forum: sweety439 2022-08-06, 13:04 Replies: 13 Views: 525 Posted By sweety439 Are there any interest to extend the sequence... Are there any interest to extend the sequence https://oeis.org/A275530?
 Forum: NFS@Home 2022-08-06, 12:45 Replies: 465 Views: 59,031 Posted By sweety439 Hi, Can I request NFS@home to factor... Hi, Can I request NFS@home to factor 13^282+1 and 13^288+1, using SNFS?
 Forum: FactorDB 2022-08-06, 12:43 Replies: 571 Views: 108,178 Posted By sweety439 this page... this page (http://factordb.com/certoverview.php?digits=20000&perpage=100&skip=0) is blank
 Forum: sweety439 2022-08-06, 11:43 Replies: 13 Views: 525 Posted By sweety439 Limit of generalized repunits In the top generalized repunit primes page (https://primes.utm.edu/top20/page.php?id=16), the condition of the generalized repunit primes (b^n-1)/(b-1) is n >= b/5, otherwise every prime can be...
 Forum: sweety439 2022-08-06, 08:34 Replies: 9 Views: 389 Posted By sweety439 Forms that only contain 5-smooth (at least... Forms that only contain 5-smooth (at least 7-smooth) numbers For the case n*2^n+1 with n>1, since it only contains the number 2, the first prime is at n=141 is unusual large, the same for 5^n+8...
 Forum: sweety439 2022-08-06, 06:19 Replies: 9 Views: 389 Posted By sweety439 But none of them have small primes, e.g. the most... But none of them have small primes, e.g. the most famous 4*72^n-1 (4 is the smallest composite number and 72 is the smallest Achilles number), it has no prime with n >= 1 until n = 1119849
 Forum: sweety439 2022-08-05, 13:22 Replies: 1,276 Views: 108,759 Posted By sweety439 R181 k=5 at n=21000, no prime or PRP Reserve... R181 k=5 at n=21000, no prime or PRP Reserve S103 (k=7)
 Forum: FactorDB 2022-08-05, 10:05 Replies: 571 Views: 108,178 Posted By sweety439 Because I want to solve my minimal prime problem... Because I want to solve my minimal prime problem (https://docs.google.com/document/d/e/2PACX-1vQct6Hx-IkJd5-iIuDuOKkKdw2teGmmHW-P75MPaxqBXB37u0odFBml5rx0PoLa0odTyuW67N_vn96J/pub) to all bases...
 Forum: sweety439 2022-08-04, 09:17 Replies: 3 Views: 8,635 Posted By sweety439 I have found that: the sequence a(n+1) =... I have found that: the sequence a(n+1) = s(a(n))+k, start with any prime number: 1: 2, 2: 3, 3: 4, 6, 9, 7, 4: 5, 5: 6, 11, 6: 7, 7: 8, 14, 17,
 2022-08-04, 02:49 Replies: 49 Views: 10,640 Posted By sweety439 Well .... There is no single known odd... Well .... There is no single known odd composite term, and there is no single known term > 3 which is == 3 mod 4
 2022-08-04, 01:52 Replies: 49 Views: 10,640 Posted By sweety439 Well, I saw the OEIS page, this sequence should... Well, I saw the OEIS page, this sequence should be infinite, but is 157 the largest odd term?
 Forum: Conjectures 'R Us 2022-08-04, 01:46 Replies: 682 Sticky: Sieving for CRUS Views: 86,296 Posted By sweety439 For R478, k=477 is already known to have no prime... For R478, k=477 is already known to have no prime with n<=200K, see https://harvey563.tripod.com/wills.txt
 Forum: FactorDB 2022-08-04, 01:36 Replies: 571 Views: 108,178 Posted By sweety439 I already know that factordb.com often down!!! So... I already know that factordb.com often down!!! So I download the primality certificates for many primes and upload them to GitHub...
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