Operation: Billion Digits

[Uncwilly]

Luigi,

1) From your list on your website, I ran all those that you have at 60 and no factor to 62 (no factors), see previous posts.

2) Could you provide a readme for you program. Or at least give all the switches and parameters.

3) Here is a fresh batch that I ran. All the numbers were run to 60bits (the last one was run to 61).

M3321929029 has a factor: 42168567094127
M3321929041 no factor from 2^2 to 2^60.
M3321929053 no factor from 2^2 to 2^60.
M3321929059 no factor from 2^2 to 2^60.
M3321929113 no factor from 2^2 to 2^60.
M3321929129 has a factor: 1063017321281
M3321929129 has a factor: 406550974523537
M3321929129 has a factor: 446771855975579753
M3321929173 no factor from 2^2 to 2^60.
M3321929179 no factor from 2^2 to 2^60.
M3321929197 no factor from 2^2 to 2^60.
M3321929209 no factor from 2^2 to 2^60.
M3321929257 has a factor: 1275434806649609
M3321929339 has a factor: 5106177450128969

Note that one has 3 factors.

Also, coming up there is an island of primes from M3321929509 - M3321929621 (12 of them.) This got me thinking, has anyone studied the areas around the exponets of Mersenne primes?

[HiddenWarrior]

Newest stats for GIMPS, LMH, LMH>79.3, Operation Billion:
http://www.yxine.km.ru/data/files/mersennestatus.zip

[Uncwilly]

Another batch, this should hold us quite a while:

M3321929357 has a factor: 26575434857
M3321929393 has a factor: 5921511883350937
M3321929393 has a factor: 35018683424306311
M3321929411 no factor from 2^2 to 2^60.
M3321929461 no factor from 2^2 to 2^60.
M3321929477 has a factor: 595324177467781721
M3321929509 has a factor: 1455005124943
M3321929519 no factor from 2^2 to 2^60.
M3321929531 has a factor: 2074963555230407
M3321929531 has a factor: 4584880631672767
M3321929551 has a factor: 8174238826850191
M3321929563 no factor from 2^2 to 2^60.
M3321929573 no factor from 2^2 to 2^60.
M3321929579 no factor from 2^2 to 2^60.
M3321929587 has a factor: 2853464432782087
M3321929599 has a factor: 11719767625273
M3321929603 has a factor: 6643859207

I have not reported factors to any place but here.

[ET_]

Originally Posted by jinydu

By the way, where did you find a list of primes bigger than (10^9)/(log 2) ?

I wrote a very small program using C and GMP library: it lists primes, asking for first and last value, adding start and stop bit in Prime95-like format, and saving them into a text file.

It probably needs Cygwin and Cyggmp-3 dll, I never tested it outside Cygwin environment.

Luigi

[ET_]

Originally Posted by Uncwilly

Luigi,

1) From your list on your website, I ran all those that you have at 60 and no factor to 62 (no factors), see previous posts.

2) Could you provide a readme for you program. Or at least give all the switches and parameters.

3) Here is a fresh batch that I ran. All the numbers were run to 60bits (the last one was run to 61).

(snip) ---------8<------------8<----------------

Also, coming up there is an island of primes from M3321929509 - M3321929621 (12 of them.) This got me thinking, has anyone studied the areas around the exponets of Mersenne primes?

1) and 3) Thank you very much! You were reserving and testing exponent quicker than I could test them up to 60 bits!

2) Which program? factor3_1, factor3_1b(atch), primelister?

The only 2 switches of factor3_1 are -h and -r: the first gives you a help screen, the second will resume your work from a previously saved "status.txt" file without retyping all parameters.

Factor3_1b has no switches: it only works if you provide a text file with each line formatted as "exponent,start-bit,stop-bit" (obviously without quotes) as standard input: for example, "factor3_1b <list.txt". If you need it I will upload here, but notice that its resume system can only be used by factor3_1, at only one exponent a time: it makes no check to the list file when the computer crashes, simply restarts from scratch.

HTH

Luigi

[ET_]

Originally Posted by HiddenWarrior

Newest stats for GIMPS, LMH, LMH>79.3, Operation Billion:
http://www.yxine.km.ru/data/files/mersennestatus.zip

Hidden Warrior:
Thank you!

Uncwilly:
I am reporting factors to Will Edgington, as "Project Billion Digits". If you like I can add your name to the factors you discovered.

All:
It's time to take another exponent up to 69 bits!

Luigi

[nitro]

no factor to 65 bits

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

[HiddenWarrior]

Here's it: 3321928241 no factor to 2^69!
I'll take 3321928381 from 63->69 bits.

[ET_]

Originally Posted by HiddenWarrior

Here's it: 3321928241 no factor to 2^69!
I'll take 3321928381 from 63->69 bits.

I'll update the page as I get home.

Luigi

[ET_]

M3321929579 no factor from 2^2 to 2^60.

Taking it to 62 bits

Luigi

[ET_]

Originally Posted by ET_

Taking it to 62 bits

Luigi

M3321929579 no factor from 2^60 to 2^62.