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Old 2004-11-30, 18:09   #23
hemster
 
Apr 2004
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Default no factors to 73 on 3321928241 and 3321929621

no factors to 73 on 3321928241 and 3321929621

Done with these guys.

Still no luck...
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Old 2004-11-30, 20:30   #24
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"Luigi"
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Quote:
Originally Posted by hemster
no factors to 73 on 3321928241 and 3321929621

Done with these guys.

Still no luck...
You've been the first to reach 73 bits wall with two exponents!

Now, for the next choice I'd advice you to choose at most 72 bits: it's way faster and let you sieve out more exponents with the same amount of time

Of course yours is the time...

Luigi
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Old 2004-12-01, 04:24   #25
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M3321931111 no factor up to 69.

I accidentaly ran the program while it was running again on the same number and bit depth. Don't know how it happened :(
So I stopped the one that was at a lower depth. I assumed that this does not invalidate my result. Because even though they were probably overwriting each others status files, the results are stored in the results.txt right?
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Old 2004-12-01, 08:42   #26
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Quote:
Originally Posted by Joshua2
M3321931111 no factor up to 69.

I accidentaly ran the program while it was running again on the same number and bit depth. Don't know how it happened :(
So I stopped the one that was at a lower depth. I assumed that this does not invalidate my result. Because even though they were probably overwriting each others status files, the results are stored in the results.txt right?
Correct.

Luigi
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Old 2004-12-01, 16:37   #27
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M3321929617 no factor from 2^69 to 2^72. (Carlo)
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Old 2004-12-01, 23:43   #28
wakko
 
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Default wrong thread...

I made a mistake and report results in a different thread than this one...
I will be more careful next time

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Old 2004-12-03, 01:02   #29
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Factored
M3321931243 up to 2^67 I am continuing...
M3321931099 up to 2^71 I am continuing on this one also...

Factor Found. Yah!!! My first factor.
M3321931111 has a factor: 1702196773411748730881
Was found searching from 70 to 71
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Old 2004-12-08, 05:45   #30
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M3321931243 no factor from 2^67 to 2^70.
Continuing until 2^72.
M3321931381 no factor from 2^60 to 2^62.
M3321931429 no factor from 2^60 to 2^62.
M3321931433 no factor from 2^60 to 2^62.
M3321931601 no factor from 2^60 to 2^62.
M3321931619 no factor from 2^60 to 2^62.
M3321931637 no factor from 2^60 to 2^62.
M3321931777 no factor from 2^60 to 2^62.
M3321931793 no factor from 2^60 to 2^62.
M3321931819 no factor from 2^60 to 2^62.
M3321931829 no factor from 2^60 to 2^62.
M3321931831 no factor from 2^60 to 2^62.
M3321931919 no factor from 2^60 to 2^62.
M3321931931 no factor from 2^60 to 2^62.
M3321931967 no factor from 2^60 to 2^62.
M3321931969 no factor from 2^60 to 2^62.
M3321931993 no factor from 2^60 to 2^62.
I'll take these to 2^64.
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Old 2004-12-08, 22:16   #31
hemster
 
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NO factors M3321928601 to 2^72
taking to 73

How is it that I will find a factor sooner if I choose smaller levels ie 2^60?

Aren't there the same ammount of numbers from 2^2 to 2^72 as there are from 2^72 to 2^73.
I am not a math major so my logic could be wrong.

ie 2^2 to 2^6 covers up to 64
2^6 to 2^7 covers 64 to 128
Each group has 64 numbers right?
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Old 2004-12-09, 06:17   #32
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Quote:
Originally Posted by hemster
How is it that I will find a factor sooner if I choose smaller levels ie 2^60?
A prime "p" divides a random number "N" with probability 1/p. Hence each trial factorization has a greater chance of success with the smaller factors.

There are more primes in each range, so the probability of actually finding a factor in a range decreases slowly, but the time to work a whole range approximately doubles.
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Old 2004-12-10, 05:31   #33
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M3321931267 has a factor: 1078901975478791259223

M3321931381 no factor from 2^62 to 2^64.
M3321931429 no factor from 2^62 to 2^64.
M3321931433 no factor from 2^62 to 2^64.
M3321931619 no factor from 2^62 to 2^64.
M3321931601 no factor from 2^62 to 2^64.
M3321931637 no factor from 2^62 to 2^64.
M3321931777 no factor from 2^62 to 2^64.
M3321931793 no factor from 2^62 to 2^64.
M3321931819 no factor from 2^62 to 2^64.
M3321931829 no factor from 2^62 to 2^64.
M3321931831 no factor from 2^62 to 2^64.
M3321931919 no factor from 2^62 to 2^64.
M3321931931 no factor from 2^62 to 2^64.
M3321931967 no factor from 2^62 to 2^64.
M3321931969 no factor from 2^62 to 2^64.
Done with these numbers, except I am taking M3321931381 to 73.

Do you check the factors reported, how?
Does the program check every odd number? I wouldn't mind having a file even if it was hundreds megabytes of primes to speed up searching.
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