Operation: Billion Digits - Page 13

nitro · 2004-04-13, 21:31

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.

Uncwilly · 2004-04-14, 06:31

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.....

jinydu · 2004-04-14, 13:29

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)?

Uncwilly · 2004-04-14, 13:36

Here is a graph that should provide a nice repreentation of the status of the project. (66% accuracy guarenteed)

Uncwilly · 2004-04-14, 16:50

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.

nitro · 2004-04-14, 21:07

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.

Maybeso · 2004-04-14, 21:22

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

ET_ · 2004-04-14, 22:02

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

jinydu · 2004-04-15, 10:45

I've downloaded a program that will automatically give me the smallest prime less than n, though it will expire in 30 days...

ET_ · 2004-04-15, 10:50

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

nitro · 2004-04-15, 18:32

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.

2004-04-14, 16:50	#137
Uncwilly 6809 > 6502 """"""""""""""""""" Aug 2003 101×103 Posts 2×3²×521 Posts	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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2004-04-14, 06:31	#134
Uncwilly 6809 > 6502 """"""""""""""""""" Aug 2003 101×103 Posts 2×3²×521 Posts	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.....

2004-04-15, 10:45	#141
jinydu Dec 2003 Hopefully Near M48 11011011110₂ Posts	I've downloaded a program that will automatically give me the smallest prime less than n, though it will expire in 30 days...