Forum: sweety439
2022-08-10, 18:56
|
|
Replies: 369
Views: 49,466
For the smallest flexible primes base b with...
For the smallest flexible primes base b with given d dividing b-1:
3,2,2
4,3,2
5,2,2
5,4,2
6,5,2
7,2,4
7,3,3
|
|
Forum: FactorDB
2022-08-10, 15:44
|
|
Replies: 571
Views: 108,008
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: 108,008
|
|
Forum: sweety439
2022-08-09, 13:45
|
|
Replies: 13
Views: 510
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: 108,625
|
|
Forum: sweety439
2022-08-08, 13:27
|
|
Replies: 13
Views: 510
|
|
Forum: Software
2022-08-08, 12:15
|
|
Replies: 7
Views: 204
|
|
Forum: Software
2022-08-08, 11:31
|
|
Replies: 7
Views: 204
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: 442,209
|
|
Forum: sweety439
2022-08-07, 03:05
|
|
Replies: 1,276
Views: 108,625
|
|
Forum: sweety439
2022-08-07, 02:46
|
|
Replies: 1,276
Views: 108,625
|
|
Forum: sweety439
2022-08-06, 14:22
|
|
Replies: 13
Views: 510
|
|
Forum: sweety439
2022-08-06, 13:04
|
|
Replies: 13
Views: 510
|
|
Forum: NFS@Home
2022-08-06, 12:45
|
|
Replies: 463
Views: 58,980
|
|
Forum: FactorDB
2022-08-06, 12:43
|
|
Replies: 571
Views: 108,008
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: 510
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: 374
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: 374
|
|
Forum: sweety439
2022-08-05, 13:22
|
|
Replies: 1,276
Views: 108,625
|
|
Forum: FactorDB
2022-08-05, 10:05
|
|
Replies: 571
Views: 108,008
|
|
Forum: sweety439
2022-08-04, 09:17
|
|
Replies: 3
Views: 8,628
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,
|
|
Forum: And now for something completely different
2022-08-04, 02:49
|
|
Replies: 49
Views: 10,594
|
|
Forum: And now for something completely different
2022-08-04, 01:52
|
|
Replies: 49
Views: 10,594
|
|
Forum: Conjectures 'R Us
2022-08-04, 01:46
|
|
Replies: 682
Views: 86,208
|
|
Forum: FactorDB
2022-08-04, 01:36
|
|
Replies: 571
Views: 108,008
|
