20141031, 00:38  #1 
Oct 2014
1 Posts 
is confusing
my numbre with 101 019 520 digits. how can i display it in internet??

20141031, 00:47  #2 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
265D_{16} Posts 
Just type it into a word document, zip it and post it.
Word documents zip much better than plain text files! 
20141031, 00:48  #3 
Bemusing Prompter
"Danny"
Dec 2002
California
2^{5}×7×11 Posts 
Inb4miscmath.

20141031, 02:44  #4  
Account Deleted
"Tim Sorbera"
Aug 2006
San Antonio, TX USA
7·13·47 Posts 
Quote:
Last fiddled with by MiniGeek on 20141031 at 02:53 

20141031, 03:21  #5 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
265D_{16} Posts 
Why not 2^(27!+1)1 ? It is surely bigger and has no known factors... yet? Must be prime, too, and much bigger!

20141031, 03:53  #6 
Romulan Interpreter
"name field"
Jun 2011
Thailand
10011011101001_{2} Posts 

20141031, 05:19  #7 
"Curtis"
Feb 2005
Riverside, CA
5277_{10} Posts 

20141031, 06:02  #8  
"Kyle"
Feb 2005
Somewhere near M52..
3×5×61 Posts 
Quote:
Digits in 2^p 1 are easy to calculate as ceiling_(p*log(2)) Is there a way to easily calculate the digits in something like x! ? if P = 27! +1 it is clear that 2^p is much, much, much bigger than 100 M digits. I would like to be able to tell how many digits... Last fiddled with by Primeinator on 20141031 at 06:03 

20141031, 06:36  #9 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
7×23×61 Posts 
Code:
(23:33) gp > \p 30 realprecision = 38 significant digits (30 digits displayed) (23:34) gp > (27!+1)*log(2)/log(10) %4 = 3277876323445093851079375875.23 It has 3277876323445093851079375876 decimal digits, but it has the usual properties of Mersenne's. So the factors are of 2kp+1 form, and (mod 8). I haven't found a factor, but it doesn't mean someone couldn't find one. It could be fun! P.S. And yes, I was suggesting a parallel to the OP's logic: "No factors are known, therefore it is surely a prime". P.P.S. There is a Stirling formula for a pretty good estimate of the value of x! Last fiddled with by Batalov on 20141031 at 06:42 
20141031, 06:40  #10 
Romulan Interpreter
"name field"
Jun 2011
Thailand
7×1,423 Posts 
3277876323445093851079375876 decimal digits.
(an idiot throws a stone in the lake and 100 sane scientists try to get it out... (romanian proverb)) [edit, grrr, I am always a step behind, hehe... ] [edit 2: and yes, by idiot I was referring to OP, and not to Serge ] [edit 3: 2^M481 may be larger... or M48#+1 ? (we had this discussion at least ten times on this forum, now other people will jump in and say larger possible primes)] [edit 4: scrap M48#, we can not construct it, as we don't know all primes up to it ] Last fiddled with by LaurV on 20141031 at 06:49 
20141031, 06:55  #11  
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
24421_{8} Posts 
Quote:


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