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Search: Posts Made By: Joshua2
Forum: Homework Help 2011-03-04, 10:20
Replies: 10
Views: 3,067
Posted By Joshua2
Minimize maximum error

I reduced my problem to this almost linear program:
minimize
max (
abs(a*1+b*3-c),
abs(a*2+b*5-c),
abs(a*3+b*7-c),
abs(a*5+b*11-c),
abs(a*7+b*14-c),
abs(a*8+b*15-c),
abs(a*10+b*19-c)
Forum: Aliquot Sequences 2011-01-15, 11:32
Replies: 42
Views: 2,640
Posted By Joshua2
I did 10 at 260e6 and 10 at 850e6. I tried to do...

I did 10 at 260e6 and 10 at 850e6. I tried to do 1e11 p-1 and it failed saying b2 was out of bounds.
Forum: Aliquot Sequences 2011-01-12, 19:04
Replies: 42
Views: 2,640
Posted By Joshua2
No, I didn't realize it doesnt automatically do a...

No, I didn't realize it doesnt automatically do a save file. I ran the 3rd pp1.
Forum: Aliquot Sequences 2011-01-12, 09:47
Replies: 42
Views: 2,640
Posted By Joshua2
I did 1e10 p-1 stage 1 was fine stage 2 crashed...

I did 1e10 p-1 stage 1 was fine stage 2 crashed and when i restarted it, it finished in 3s, so don't know if it worked or not.
did 2 1e9 pp1 runs
Forum: Factoring 2010-06-06, 04:25
Replies: 35
Views: 3,101
Posted By Joshua2
his n following, is it weak? P1 = 2 P1 = 2 ...

his n following, is it weak?
P1 = 2
P1 = 2
P1 = 3
P4 = 1381
P4 = 1787
PRP5 = 40819
PRP5 = 62653
Forum: Factoring 2010-06-04, 23:10
Replies: 35
Views: 3,101
Posted By Joshua2
so have you tried ecm or fermat's method on them...

so have you tried ecm or fermat's method on them yet?
Forum: Twin Prime Search 2010-06-04, 21:25
Replies: 735
Views: 31,353
Posted By Joshua2
I get like 68M - 72M p/sec on my dual core i5...

I get like 68M - 72M p/sec on my dual core i5 laptop. I calculated a tad over 4 hours then for 1T if my math was right. Or 8 continuous days for 50T
Forum: Twin Prime Search 2010-06-02, 04:53
Replies: 735
Views: 31,353
Posted By Joshua2
taking 200T-300T i guess

taking 200T-300T i guess
Forum: Twin Prime Search 2010-03-17, 04:36
Replies: 11
Views: 1,460
Posted By Joshua2
once there is a cuda sieve that is much faster we...

once there is a cuda sieve that is much faster we should start up again
Forum: Twin Prime Search 2010-02-25, 21:33
Replies: 11
Views: 1,460
Posted By Joshua2
I'm still around, but I don't know what's up or...

I'm still around, but I don't know what's up or if I have any sieve file.
Forum: Aliquot Sequences 2010-02-23, 06:13
Replies: 2,903
Views: 164,602
Posted By Joshua2
I'm mostly done with my 1000 curves.

I'm mostly done with my 1000 curves.
Forum: Aliquot Sequences 2010-02-21, 07:51
Replies: 2,903
Views: 164,602
Posted By Joshua2
At what point do you extend B2 vs B1? I always...

At what point do you extend B2 vs B1? I always just use default B2 and extend B1. anyone care to run B2 on this pp1? we can prob call this last 1 did 1 other with same bounds and one with a quarter....
Forum: Homework Help 2010-02-19, 22:21
Replies: 12
Views: 1,708
Posted By Joshua2
so for my example GCD(2,5) == 1 so exists...

so for my example GCD(2,5) == 1 so exists inverse. So I find ax + by = 1 or -2*2 + 1*5 = 1, and I'm not quite sure what to do. Also, how would state my question in proper math context, "x^-1 = 2 mod...
Forum: Aliquot Sequences 2010-02-19, 22:09
Replies: 2,903
Views: 164,602
Posted By Joshua2
file psave p+1 resume file at my gmp's max B1...

file psave p+1 resume file at my gmp's max B1 bounds for archival purposes, running B2
file pp1 completed 1e9 default b2
file pm1 completed 1e10 crashed during b2 someone else can try

running...
Forum: Homework Help 2010-02-19, 21:10
Replies: 12
Views: 1,708
Posted By Joshua2
I think I understand CRT now. Now I just need to...

I think I understand CRT now. Now I just need to figure out modulo inverses, like what is inverse of 2 mod 5...
Forum: Aliquot Sequences 2010-02-19, 18:23
Replies: 2,903
Views: 164,602
Posted By Joshua2
that factors database should let you edit or...

that factors database should let you edit or delete stuff if you make a mistake entering. I didn't actually do the ECM work posted lol.
Forum: Aliquot Sequences 2010-02-19, 16:39
Replies: 2,903
Views: 164,602
Posted By Joshua2
Ok, doing that to 1e10 for now I guess. I guess...

Ok, doing that to 1e10 for now I guess. I guess I'll do a run with pp1 to 1e9.
Forum: Aliquot Sequences 2010-02-19, 08:24
Replies: 2,903
Views: 164,602
Posted By Joshua2
i would think cpu time is better spent doing like...

i would think cpu time is better spent doing like ecm since gpus are faster at poly's I will do p-1 if no one else is.
Forum: Homework Help 2010-02-19, 06:56
Replies: 12
Views: 1,708
Posted By Joshua2
Where did 40, 30 and 48 come from? I assume the...

Where did 40, 30 and 48 come from? I assume the 1+0+0 thing is prime factored?
Forum: Homework Help 2010-02-19, 06:53
Replies: 12
Views: 1,708
Posted By Joshua2
1. I don't think it is CRT, because I read that...

1. I don't think it is CRT, because I read that you use euclid's extended algorithm, and we didn't use it.
2. I think that is what we did before, reduce by one.
A = -2 - B = 3 + 4B so -2 - 3 = 5B...
Forum: Homework Help 2010-02-18, 07:56
Replies: 12
Views: 1,708
Posted By Joshua2
This way makes a ton of sense. Is this the CRT as...

This way makes a ton of sense. Is this the CRT as well? Its seems we can't continue with 2A = 1 + 3A and A = 3 + 4A? I think I did that wrong. How about A = 3 + 4B and 2A = 1 + 3 B with two...
Forum: Homework Help 2010-02-17, 20:07
Replies: 12
Views: 1,708
Posted By Joshua2
solving modular constraints

x = 1 mod 3
x = 2 mod 4
x = 3 mod 5

so I changed the numbers from my problem, but its similar. I'm trying to find what x could be. I'm pretty sure I can do LCM of 3,4,5 and know the answer is...
Forum: Factoring 2010-02-17, 04:04
Replies: 81
Views: 9,425
Posted By Joshua2
can u post a binary once you get one faster than...

can u post a binary once you get one faster than Jeff's win64 binary?
Forum: Msieve 2010-02-16, 21:14
Replies: 223
Views: 21,605
Posted By Joshua2
I got it to work by resetting my computer and not...

I got it to work by resetting my computer and not ever trying any other gpu activities like boinc or folding@home. I think it was some sort of weird interaction between things, even though before I...
Forum: Aliquot Sequences 2010-02-13, 02:55
Replies: 2,903
Views: 164,602
Posted By Joshua2
i tried running msieve -np 1,100 and it took 13...

i tried running msieve -np 1,100 and it took 13 minutes and after lots of:
poly 0 p 226547647 q 237869767 coeff 53888836006288249 it said:
error generating or reading NFS polynomials
Showing results 1 to 25 of 533

 
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