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Old 2004-04-13, 21:31   #133
nitro
 
Feb 2003

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Default 3321928373 - update

Quote:
Originally Posted by nitro
no factor to 65 bits

M3321928373 no factor from 2^63 to 2^64.
M3321928373 no factor from 2^64 to 2^65.

M3321928373 no factor from 2^65 to 2^66.
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Old 2004-04-14, 06:31   #134
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M3321929041 no factor from 2^60 to 2^62.


I will slowly work on M3321928307 to take it to 70 (currently at 69.09). (Or get a factor). I hope to be the first to 70bit.

I made some graphs on our progress in Excel, but to get them out of it into a .gif is a pain and then they are too large to post. I will see what I can do.....
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Old 2004-04-14, 13:29   #135
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Quote:
Originally Posted by Uncwilly
Well I took the current high end, the I ran higher numbers through http://www.2357.a-tu.net/index.php?link=Primality

I have run a bunch to 60 bits and will report the data once I finish my list. (Soon.)
That site is a little inconvenient. Does anyone know a site that can give for smallest prime greater than n, where n is allowed to be "reasonably" large (rather than manually typing in possible primes and testing them one at a time)?

Last fiddled with by jinydu on 2004-04-14 at 13:31
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Old 2004-04-14, 13:36   #136
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Here is a graph that should provide a nice repreentation of the status of the project. (66% accuracy guarenteed)
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File Type: zip Billstat.zip (7.6 KB, 145 views)
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Old 2004-04-14, 16:50   #137
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Based upon the mention in a different thread
this posting
I did TF
Code:
M3321928094941 no factor from 2^2 to 2^60.
M3321928094941 no factor from 2^60 to 2^65.
M3321928094941 no factor from 2^65 to 2^70.
M3321928094941 no factor from 2^70 to 2^72.
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Old 2004-04-14, 21:07   #138
nitro
 
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Default 3321928373 - update

Quote:
Originally Posted by nitro
M3321928373 no factor from 2^65 to 2^66.
Neither is there a factor to 67 bits

M3321928373 no factor from 2^66 to 2^67.
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Old 2004-04-14, 21:22   #139
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Quote:
Originally Posted by jinydu
That site is a little inconvenient. Does anyone know a site that can give for smallest prime greater than n, where n is allowed to be "reasonably" large (rather than manually typing in possible primes and testing them one at a time)?
Dario Alperns Applet supports B(n) for pseudoprime previous to n, and N(n) for pseudoprime next to n. Scroll down for the explanation. You still have to type them in one at a time, but you'll get very very few misses, and it immediately checks the primality for you.

HTH, Bruce
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Old 2004-04-14, 22:02   #140
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Quote:
Originally Posted by jinydu
That site is a little inconvenient. Does anyone know a site that can give for smallest prime greater than n, where n is allowed to be "reasonably" large (rather than manually typing in possible primes and testing them one at a time)?
Try this program, with the two Cygwin libraries...

Luigi
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File Type: zip primelister.zip (4.3 KB, 135 views)
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Old 2004-04-15, 10:45   #141
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I've downloaded a program that will automatically give me the smallest prime less than n, though it will expire in 30 days...
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Old 2004-04-15, 10:50   #142
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Quote:
Originally Posted by jinydu
I've downloaded a program that will automatically give me the smallest prime less than n, though it will expire in 30 days...
I wrote a program that can give you the smallest prime greater than n.

It's freeware... just ask for it.

Luigi
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Old 2004-04-15, 18:32   #143
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Quote:
Originally Posted by nitro
Neither is there a factor to 67 bits

M3321928373 no factor from 2^66 to 2^67.
Neither is there one to 68 bits

M3321928373 no factor from 2^67 to 2^68.
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