20090906, 21:28  #1 
Random Account
Aug 2009
2×3^{4}×13 Posts 
15M Digits  Just For Fun
I've picked a block of 40 exponents which could yield a 15 million digit number. I generated these myself.
The first step is to trial factor to 2^{65}, which is running now. Those that survive, will go to 2^{69}. After that, I don't know yet. I'm doing this just for the fun of it. Perhaps this is why I've asked so many questions over the last month or so. Who know? Thank you to those who helped me learn how to determine number lengths! 
20090907, 00:28  #2 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
2·5·983 Posts 
Have you checked whether this job was not in fact already done?
E.g. http://www.mersenne.org/report_expon...&B1=Get+status shows that most such exponents are already done to 2^69. 
20090907, 01:12  #3 
Random Account
Aug 2009
2·3^{4}·13 Posts 
As I said, this is just for fun.
http://www.mersenne.org/report_expon...&B1=Get+status What I am playing with is not in this range. However, I did check my range. Some are done and some are not. I didn't "check" these out on the server therefore I am not obligated to report any results. 
20090907, 08:18  #4 
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
5·7^{2}·43 Posts 
However if you check them out for LL, Prime95 will set the bit level to TF to. And if you do report the results you will save someone from redoing it.

20090907, 11:13  #5 
Account Deleted
"Tim Sorbera"
Aug 2006
San Antonio, TX USA
7×13×47 Posts 
I recommend that you coordinate your work and results through PrimeNet. It's as simple as checking the Use PrimeNet box. (in Test > PrimeNet, the checkbox)
There are many benefits (e.g. no wasted work, and you get GIMPS credit) and very few downsides (only one I can think of is that an offline computer will be more difficult to manage). 
20090908, 00:49  #6 
Random Account
Aug 2009
2·3^{4}·13 Posts 
I'll make all of you a deal. I'l factor everything through 2^{69} then check to see what's been done. Out of the 40, there's only been two with factors so far. There's 9 left in the first round to 2^{65}.
I've got my cores set up to work on just one exponent at a time. This makes it all a bit easier to see; my eyes are not so great anymore. 
20090908, 02:11  #7 
Random Account
Aug 2009
100000111010_{2} Posts 
I've changed my mind. I'll attempt to reserve the exponents I am working with, even if I have to send George an email. There are 15 of them, not assigned, as far as I can tell. All have been factored to 2^{69}.
I'll factor them all to 2^{70}. I want to be able to spread them across multiple computers, not tied to any one in particular. 
20090908, 04:14  #8  
Random Account
Aug 2009
2·3^{4}·13 Posts 
I can't reserve them. Oh well.
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