20120303, 02:43  #1 
"James Heinrich"
May 2004
exNorthern Ontario
3356_{10} Posts 
How to generate base10 representation of Mersenneprime perfect numbers?
I found this site which has base10 representations of Mersenneprime perfect numbers, but it's lacking the ones for M45M47. How can I generate these?
Something that runs on Windows would be great, but if I do it with PARI I also have access to that on *nix. 
20120303, 02:56  #2 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
5^{2}×13×29 Posts 
Pari
Code:
allocatemem(800000000) P=37156667; write("perf45",2^(P1)*(2^P1)) P=42643801; write("perf46",2^(P1)*(2^P1)) P=43112609; write("perf47",2^(P1)*(2^P1)) # in *nix fold < perf47 > perf47.txt 
20120303, 08:58  #3 
Mar 2006
Germany
101101001010_{2} Posts 
With pfgw:
Code:
pfgw od q"2^43112608*(2^431126091)" >M47.txt 
20120303, 13:17  #4  
"James Heinrich"
May 2004
exNorthern Ontario
2^{2}·839 Posts 
Quote:
I tried PARI, and failed. On *nix, all I could get was a Segmentation Fault. On Windows, it ran for 15 minutes and didn't seem to be doing anything so I aborted (by contrast, pfgw only took about 45 seconds). Last fiddled with by James Heinrich on 20120303 at 13:18 

20120303, 13:28  #5  
"Forget I exist"
Jul 2009
Dumbassville
2^{6}·131 Posts 
Quote:
Code:
(09:26)>MeVec %240 = [2, 3, 5, 7, 13, 17, 19, 31, 61, 89, 107, 127, 521, 607, 1279, 2203, 2281, 3217, 4253, 4423, 9689, 9941, 11213, 19937, 21701, 23209, 44497, 86243, 110503, 132049, 216091, 756839, 859433, 1257787, 1398269, 2976221, 3021377, 6972593, 13466917] (09:26)>for(x=1,#MeVec, print((2^(MeVec[x]1))*(2^MeVec[x]1))) 

20120303, 20:11  #6 
Basketry That Evening!
"Bunslow the Bold"
Jun 2011
40<A<43 89<O<88
1110000110101_{2} Posts 
Maybe perhaps wait until we know whether or not we know M48?

20120308, 00:20  #7 
Apr 2010
2·7 Posts 

20120308, 02:42  #8  
Romulan Interpreter
Jun 2011
Thailand
2^{5}·5·59 Posts 
Quote:


20120308, 06:45  #9 
Apr 2010
2×7 Posts 
NO

20120308, 07:05  #10 
Romulan Interpreter
Jun 2011
Thailand
2^{5}×5×59 Posts 

20120308, 07:20  #11 
Basketry That Evening!
"Bunslow the Bold"
Jun 2011
40<A<43 89<O<88
1110000110101_{2} Posts 
Well what makes you think it's his website? Also, he's been here longer than I have.

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