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Forum: Factoring 2011-07-22, 10:26
Replies: 3
Views: 1,391
Posted By klajok
1)...

1) http://en.wikipedia.org/wiki/Extended_Euclidean_algorithm
2) as far as the scientists know: "I know φ(n)" means "I know factors of number n" if n is a product of 2 prime numbers.
Forum: Factoring 2011-07-21, 08:23
Replies: 0
Views: 1,909
Posted By klajok
primo primality certificates - (un)lucky numbers

Recently I certificated some prime numbers from factordb database using primo and observed big differences in time required to certificate. Below are my best / worst iterations so far:

Best:...
Forum: Aliquot Sequences 2010-08-21, 11:56
Replies: 1,167
Views: 55,763
Posted By klajok
Releasing 12345678 at index 1223: C137 = 25 * 32...

Releasing 12345678 at index 1223: C137 = 25 * 32 * 5 * 2161 * C130
where C130 was ECM-ed up to 2440 @ 3e6 and 700 @ 11e6.
Forum: Aliquot Sequences 2010-08-19, 22:24
Replies: 261
Views: 62,247
Posted By klajok
I found that sequence 2^12 * 8191 * 29243...

I found that sequence 2^12 * 8191 * 29243 (http://factordb.com/search.php?se=1&aq=981112475648&action=all&fr=&to=) ends with prime!
Forum: Aliquot Sequences 2010-08-18, 17:28
Replies: 261
Views: 62,247
Posted By klajok
aliquot 12345678, iteration 1199: c129 = 27...

aliquot 12345678, iteration 1199:

c129 = 27 * 3 * 7 * 421 * 3617 * 5407 * 341287 * p55 * q55

p55 = 5777398822892520031605250147118497503359280555931268443
q55 =...
Forum: Aliquot Sequences 2010-08-10, 17:30
Replies: 1,167
Views: 55,763
Posted By klajok
N8=12345678 has changed and currently is slowly...

N8=12345678 has changed and currently is slowly going up. I've got too slow machine to officially reserve next sequence. Recently I tried other numbers of the form Nk=123456...<k>. For odd k...
Forum: Aliquot Sequences 2010-08-04, 20:27
Replies: 1,167
Views: 55,763
Posted By klajok
12345678

Reserving 12345678:
Seq Index Size Co-factor Driver/Guide
12345678 858 112 109 2^2 * 7
In fact I started from:
Seq Index Size Co-factor Driver/Guide
12345678 ...
Forum: FactorDB 2010-08-04, 07:53
Replies: 1,627
Views: 204,641
Posted By klajok
number 57 or 283

[I am not sure if it is right thread for such problem]

At page http://factordb.com/search.php?id=167488215 there is listed number 57 which is obviously factored, but blocks progress of sequence:...
Forum: PrimeNet 2009-12-23, 20:02
Replies: 44
Views: 6,185
Posted By klajok
Recent cleared without TF-LMH

I have a small request / suggestion (this is too small for a new topic): Presently "Recent cleared" shows all recently cleared numbers, so in practice it shows almost only TF-LMH results. I think it...
Forum: Software 2009-01-03, 15:25
Replies: 3
Views: 918
Posted By klajok
Maybe this comment helps in the discussion: ...

Maybe this comment helps in the discussion:

According to http://v5www.mersenne.org/various/math.php trial dividing is much more efficient than O(n) (where n is number of digits). We have to do...
Forum: PrimeNet 2008-12-17, 10:15
Replies: 2
Views: 831
Posted By klajok
Unhappy [Bug] Wrong parsing some results of manual testing

Hi!

Yesterday I have reported my manual results at http://v5www.mersenne.org/manual_result/ . I have pasted following text:
[Tue Dec 16 04:58:51 2008]
P-1 found a factor in stage #2, B1=2000000,...
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