Forum: Proth Prime Search
2022-07-05, 14:36
|
|
Replies: 5
Views: 101
|
|
Forum: sweety439
2022-07-05, 12:36
|
|
Replies: 355
Views: 45,639
|
|
Forum: sweety439
2022-07-02, 20:53
|
|
Replies: 355
Views: 45,639
We have completely solved the "minimal prime >...
We have completely solved the "minimal prime > base problem" in bases 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 24
Also, we have completely solved the "minimal prime > base problem" in the...
|
|
Forum: sweety439
2022-07-01, 19:24
|
|
Replies: 355
Views: 45,639
Some minimal primes (start with b+1) in...
Some minimal primes (start with b+1) in power-of-2 bases related to Sierpinski problem, Riesel problem, dual Sierpinski problem, dual Riesel problem (see https://oeis.org/A046067,...
|
|
Forum: sweety439
2022-07-01, 19:13
|
|
Replies: 355
Views: 45,639
For a sub-problem of this problem, finding the...
For a sub-problem of this problem, finding the minimal (a,b,c) triple (i.e. there is no a' <= a, b' <= b, c' <= c, except the case a' = a and b' = b and c' = c) such that xxx...xxxyyy...yyyzzz...zzz...
|
|
Forum: sweety439
2022-07-01, 08:05
|
|
Replies: 0
Views: 40
New Mixed Proth Theorem
See PrimeGrid New Sierpinski Problem (https://www.rieselprime.de/ziki/PrimeGrid_New_Sierpi%C5%84ski_Problem) and Mixed Sierpinski Theorem...
|
|
Forum: XYYXF Project
2022-06-30, 18:00
|
|
Replies: 571
Views: 126,086
You have mtsieve...
You have mtsieve (https://sourceforge.net/projects/mtsieve/) + OpenPFGW (https://sourceforge.net/projects/openpfgw/), can I request you to build the list of generalized repunit primes?
ABC2...
|
|
Forum: And now for something completely different
2022-06-30, 17:35
|
|
Replies: 184
Views: 11,603
For (10^1031-1)/9, N-1 can be easily >= 1/3...
For (10^1031-1)/9, N-1 can be easily >= 1/3 factored, and N-1 primality proving (https://primes.utm.edu/prove/prove3_1.html) can be used, I think 10^1000+453 (which is the next prime after 10^1000)...
|
|
Forum: XYYXF Project
2022-06-30, 17:24
|
|
Replies: 57
Views: 16,574
|
|
Forum: XYYXF Project
2022-06-30, 17:08
|
|
Replies: 57
Views: 16,574
A number pass a primality test (e.g. Fermat...
A number pass a primality test (e.g. Fermat primality test, strong primality test, Lucas strong primality test, strong Lucas primality test, …) need not be prime, for the smallest composites that...
|
|
Forum: Homework Help
2022-06-29, 18:11
|
|
Replies: 6
Views: 524
7 and 13 are unique primes in base 2
7 is...
7 and 13 are unique primes in base 2
7 is the only prime with period length 3 in base 2, and 13 is the only prime with period length 12 in base 2
see factorization of Phi(n,2)...
|
|
Forum: sweety439
2022-06-29, 10:04
|
|
Replies: 43
Views: 7,226
pdf file for broken link...
pdf file for broken link https://cbright.myweb.cs.uwindsor.ca/reports/cs662-problem12.pdf
from wayback machine:...
|
|
Forum: sweety439
2022-06-29, 10:03
|
|
Replies: 43
Views: 7,226
|
|
Forum: sweety439
2022-06-29, 10:00
|
|
Replies: 43
Views: 7,226
|
|
Forum: Factoring
2022-06-28, 17:32
|
|
Replies: 502
Views: 77,348
|
|
Forum: Miscellaneous Math
2022-06-27, 09:40
|
|
Replies: 32
Views: 826
|
|
Forum: Miscellaneous Math
2022-06-27, 09:36
|
|
Replies: 32
Views: 826
|
|
Forum: sweety439
2022-06-25, 14:20
|
|
Replies: 1,270
Views: 105,127
|
|
Forum: Software
2022-06-24, 14:02
|
|
Replies: 5
Views: 224
|
|
Forum: Software
2022-06-24, 13:52
|
|
Replies: 5
Views: 224
|
|
Forum: Software
2022-06-24, 13:08
|
|
Replies: 5
Views: 224
Can PFGW run the strong Lucas primality test?
Can PFGW run the strong Lucas primality test, with parameters (P, Q) defined by Selfridge's Method A (see https://oeis.org/A217255 and http://ntheory.org/pseudoprimes.html)? I have used PFGW to...
|
|
Forum: sweety439
2022-06-24, 06:19
|
|
Replies: 355
Views: 45,639
|
|
Forum: sweety439
2022-06-24, 06:09
|
|
Replies: 355
Views: 45,639
|
|
Forum: Miscellaneous Math
2022-06-24, 05:57
|
|
Replies: 32
Views: 826
|
|
Forum: And now for something completely different
2022-06-24, 05:53
|
|
Replies: 164
Views: 36,340
The top Generalized Lucas Number...
The top Generalized Lucas Number (https://primes.utm.edu/top20/page.php?id=23) is U(24, - 25, 43201), which is equal to (25^43201+1)/26, but it is still "PRP" in factordb...
|
