Forum: Computer Science & Computational Number Theory
2011-04-20, 05:18
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Replies: 35
Views: 13,018
Here is some SPRP code I put together for the...
Here is some SPRP code I put together for the AP26 project. You can find the full source at http://sites.google.com/site/geoffreywalterreynolds/programs/ap26, look in the PrimeQ_x86.h header.
The...
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Forum: Five or Bust - The Dual Sierpinski Problem
2011-02-14, 02:16
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Replies: 90
Views: 94,600
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Forum: Five or Bust - The Dual Sierpinski Problem
2010-09-24, 03:06
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Replies: 83
Views: 89,667
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Forum: Five or Bust - The Dual Sierpinski Problem
2010-09-19, 00:47
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Replies: 83
Views: 89,667
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Forum: Factoring
2010-09-13, 23:50
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Replies: 23
Views: 1,988
I have checked the overlap between the...
I have checked the overlap between the Homogeneous Cunningham and Generalized Fermat tables, it turns out there were 11 factors found independently by both projects, 2 in the Homogeneous Cunningham...
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Forum: Factoring
2010-09-13, 06:21
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Replies: 23
Views: 1,988
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Forum: Factoring
2010-09-13, 05:36
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Replies: 23
Views: 1,988
I found this p44 factor after about 500 curves...
I found this p44 factor after about 500 curves with B1=11e6: 14571454116637488440882751359138387691414529 | 8^(2^8) + 5^(2^8)
If anyone wanted to finish some of these off with GNFS, I think the...
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Forum: Factoring
2010-08-27, 03:06
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Replies: 23
Views: 1,988
Oh no, it looks like I accidentally volunteered...
Oh no, it looks like I accidentally volunteered for more than I planned to :-) I really only intended to keep track of curves on a^(2^m) + b^(2^m) where b < a <= 12, i.e. the same ones that Wilfrid...
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Forum: Factoring
2010-08-26, 04:13
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Replies: 23
Views: 1,988
ECM on small Generalised Fermat numbers
I would like to invite anyone who has done ECM work on small Generalised Fermat numbers a^(2^m) + b^(2^m) to report their ECM curve counts in this thread. Discussion about this and related projects...
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Forum: Lounge
2010-03-29, 21:49
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Replies: 15
Views: 921
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Forum: Factoring
2010-03-28, 23:47
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Replies: 14
Views: 1,192
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Forum: Five or Bust - The Dual Sierpinski Problem
2010-02-10, 05:12
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Replies: 66
Views: 88,509
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Forum: Five or Bust - The Dual Sierpinski Problem
2010-02-10, 04:46
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Replies: 66
Views: 88,509
If you are sieving sequences k*b^n+/-1 then...
If you are sieving sequences k*b^n+/-1 then internally sr2sieve converts each one into a number of subsequences of the form (k*b^d)*(b^Q)^m+/-1, where 0 <= d < Q, m = n\Q, and Q is some value chosen...
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Forum: Five or Bust - The Dual Sierpinski Problem
2009-12-09, 01:37
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Replies: 66
Views: 88,509
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Forum: Five or Bust - The Dual Sierpinski Problem
2009-11-25, 03:04
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Replies: 66
Views: 88,509
Now that there is just one squence left in the...
Now that there is just one squence left in the sieve, it seems that sr2sieve is once again not selecting the best parameters automatically, so please try adding "-Q 720" to the command line to see if...
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Forum: Five or Bust - The Dual Sierpinski Problem
2009-11-25, 02:51
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Replies: 22
Views: 78,103
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Forum: Sierpinski/Riesel Base 5
2009-10-28, 05:46
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Replies: 522
Views: 30,661
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Forum: Sierpinski/Riesel Base 5
2009-10-22, 05:53
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Replies: 522
Views: 30,661
geocities site closing
geocities.com is closing on the 26 October 2009, so anyone using srsieve or any of my other programs should download whatever they need before then.
If anyone knows somewhere else to host these...
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Forum: Linux
2009-09-17, 03:49
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Replies: 1
Views: 1,185
I am pretty sure that you can't link a 64-bit...
I am pretty sure that you can't link a 64-bit library with 32-bit code, or vice versa. Maybe there is a way to build a "fat" binary that runs in both modes, but even then you would need both 32- and...
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Forum: Five or Bust - The Dual Sierpinski Problem
2009-09-17, 03:39
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Replies: 66
Views: 88,509
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Forum: Five or Bust - The Dual Sierpinski Problem
2009-09-17, 03:34
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Replies: 66
Views: 88,509
Even though k=2131 was the lightest weight...
Even though k=2131 was the lightest weight sequence (accounting for 30% of terms in the sieve), it contributed 24 (42%) of the 57 subsequences sieved by sr2sieve (i.e. there were 24 different values...
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Forum: Sierpinski/Riesel Base 5
2009-09-17, 03:30
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Replies: 522
Views: 30,661
sr2sieve 1.8.11
This version reorganises the algorithm to allow an earlier short-circuit when all terms in the sieve are quadratic non-residues. If there are x sequences in the sieve then this happens about 1 time...
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Forum: Sierpinski/Riesel Base 5
2009-09-17, 03:22
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Replies: 522
Views: 30,661
sr2sieve 1.8.10
This version fixes an array overrun that can occur when using a subsequence base b^Q with Q < 16. This bug was introduced in version 1.8.6, and the most likely symptom is a crash during...
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Forum: Five or Bust - The Dual Sierpinski Problem
2009-09-09, 06:48
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Replies: 25
Views: 80,568
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Forum: Twin Prime Search
2009-09-07, 04:31
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Replies: 311
Views: 24,530
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