| Topic: |
Science > Physics |
| User: |
"dedanoe" |
| Date: |
09 Apr 2006 02:03:23 PM |
| Object: |
649 dedanoe's wired number |
regarding dedanoe's rootless criterion for primality at:
http://dedanoe.tripod.com/primality/index.pdf
begin
649=26^2-5^2-1-1 potentially prime
649=27^2-8^2-4^2 potentially prime
649=28^2-11^2-3^2-2^2-1=11(70-11) definitly composite
end.
Q: in A=Trunc(Sqrt(N))+M which M concludes the criterion?
http://dedanoe.tripod.com
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| User: "Dik T. Winter" |
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| Title: Re: 649 dedanoe's wired number |
10 Apr 2006 05:48:21 AM |
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In article <1144609403.395487.32000@e56g2000cwe.googlegroups.com> "dedanoe" <dedanoe@yahoo.com> writes:
....
begin
649=26^2-5^2-1-1 potentially prime
649=27^2-8^2-4^2 potentially prime
649=28^2-11^2-3^2-2^2-1=11(70-11) definitly composite
end.
Q: in A=Trunc(Sqrt(N))+M which M concludes the criterion?
Depends on N. And it can get very large. That method is not better
than Fermat's method to factorise numbers. And factorisation is
much, much slower than prime proving.
--
dik t. winter, cwi, kruislaan 413, 1098 sj amsterdam, nederland, +31205924131
home: bovenover 215, 1025 jn amsterdam, nederland; http://www.cwi.nl/~dik/
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| User: "dedanoe" |
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| Title: Re: 649 dedanoe's wired number |
11 Apr 2006 04:46:28 AM |
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ok then i will change the approach
http://dedanoe.tripod.com
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