20180417, 15:49  #1 
Dec 2017
157 Posts 
Where can I find a arbitrary precision Calculator online that can handle this #
Where can I find a arbitrary precision Calculator online that can handle this #
2^426450911 I found this one http://numcalc.com/ but it just sits there when computing this number. I want to see this number in decimal format. 2^426450911 
20180417, 16:05  #2 
Sep 2002
Database er0rr
5×701 Posts 
What you are asking is a little too much even for the great online PARI/GP calculator.
You might have use an offline calculator like PFGW. Why do you want to see the decimal expansion? Last fiddled with by paulunderwood on 20180417 at 16:10 
20180417, 16:15  #3 
Einyen
Dec 2003
Denmark
2982_{10} Posts 
You can also use this old command line program: "mprintc5.zip"
http://www.apfloat.org/apfloat/ In a command prompt use: mprint.exe 42645091 > M42645091.txt to write the number to a file called "M42645091.txt" or just: mprint.exe 42645091 to print to the command prompt, but it will probably take a long time to print. If you want it in another base you can add a base between 2 and 36. For example to get it in hexidecimal: mprint.exe 42645091 16 > M42645091hex.txt Last fiddled with by ATH on 20180417 at 16:18 
20180417, 16:15  #4  
Dec 2017
157 Posts 
Quote:
Where can I download PFGW at and thanks :) 

20180417, 16:23  #5 
Sep 2002
Database er0rr
110110110001_{2} Posts 
https://sourceforge.net/projects/openpfgw/
You can then run PFGW with the following switches: f0 od q"2^426450911" 
20180417, 16:28  #6  
Dec 2017
157 Posts 
Quote:
You are awesome 

20180417, 17:41  #7 
"Curtis"
Feb 2005
Riverside, CA
2^{4}·281 Posts 

20180417, 18:08  #8 
Dec 2017
157 Posts 
well now that I have the number I can try and use 2^426450911 from mprint to see if it is prime without gimps if its possible to check its prime online or software. I'm waiting to find a large prime tester tho. I don't wish to wait a long time at gimps.

20180417, 18:14  #9  
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
22E5_{16} Posts 
Quote:
Educate yourself about Mersenne primes. Last fiddled with by Uncwilly on 20180417 at 18:16 

20180417, 18:18  #10 
Dec 2017
157 Posts 
[QUOTE=Uncwilly;485551]2^426450911 has a factor https://www.mersenne.org/report_expo...exp_hi=&full=1. See how easy that was?
Sorry thank you Last fiddled with by ONeil on 20180417 at 18:22 Reason: my ego 
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