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Forum: Aliquot Sequences 2022-08-07, 08:29
Replies: 3,698
Views: 441,652
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: 1,275
Views: 108,386
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: 1,275
Views: 108,386
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: 11
Views: 415
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: 11
Views: 415
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: 463
Views: 58,908
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: 568
Views: 107,742
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: 11
Views: 415
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: 351
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: 351
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: 1,275
Views: 108,386
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: 568
Views: 107,742
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: 8,619
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,
Forum: And now for something completely different 2022-08-04, 02:49
Replies: 49
Views: 10,538
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
Forum: And now for something completely different 2022-08-04, 01:52
Replies: 49
Views: 10,538
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
Views: 86,051
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: 568
Views: 107,742
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...
Forum: And now for something completely different 2022-08-04, 01:34
Replies: 49
Views: 10,538
Posted By sweety439
Should this sequence be finite or infinite? (e.g....

Should this sequence be finite or infinite? (e.g. A080327 (https://oeis.org/A080327) and A107360 (https://oeis.org/A107360) and A120024 (https://oeis.org/A120024) should be finite)
Forum: Conjectures 'R Us 2022-08-02, 12:03
Replies: 5
Views: 4,879
Posted By sweety439
Found 10812*10^28182-1 is prime, it is the first...

Found 10812*10^28182-1 is prime, it is the first prime of the form 10812*10^n-1 (10812 is the smallest k > 10175 not == 1 mod 3 which does not have an easy prime of the form k*10^n-1)
Forum: And now for something completely different 2022-08-02, 07:50
Replies: 170
Views: 37,643
Posted By sweety439
You want to prove the numbers in this list up to...

You want to prove the numbers in this list up to what number? 2^176177+60947?
Forum: sweety439 2022-08-02, 07:49
Replies: 368
Views: 49,247
Posted By sweety439
Just let you know, I know exactly what bases 2 <=...

Just let you know, I know exactly what bases 2 <= b <= 1024 have these families unsolved: (at length 100000) (also exactly what bases 2 <= b <= 1024 have these families proven as only contain...
Forum: sweety439 2022-08-01, 23:01
Replies: 9
Views: 351
Posted By sweety439
by me.

by me.
Forum: Prime Wiki 2022-08-01, 22:59
Replies: 204
Sticky: Prime-Wiki
Views: 83,120
Posted By sweety439
3*912^132173+1 is prime, see...

3*912^132173+1 is prime, see http://www.noprimeleftbehind.net/crus/Sierp-conjectures.htm#S912, my list...
Forum: sweety439 2022-08-01, 21:55
Replies: 1,275
Views: 108,386
Posted By sweety439
R181 k=21 at n=12K reserve R181 k=5

R181 k=21 at n=12K

reserve R181 k=5
Forum: sweety439 2022-07-31, 20:53
Replies: 1,275
Views: 108,386
Posted By sweety439
status update: R85 at n=15K R31 k=5 at...

status update:

R85 at n=15K
R31 k=5 at n=30K
Showing results 1 to 25 of 1000
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