Forum: Operazione Doppi Mersennes
2014-01-25, 12:19
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Replies: 495
Views: 46,806
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Forum: Operazione Doppi Mersennes
2013-12-05, 11:13
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Replies: 495
Views: 46,806
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Forum: Operazione Doppi Mersennes
2013-12-05, 11:11
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Replies: 625
Views: 63,153
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Forum: Operazione Doppi Mersennes
2013-10-04, 11:50
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Replies: 495
Views: 46,806
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Forum: Operazione Doppi Mersennes
2013-10-04, 11:47
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Replies: 625
Views: 63,153
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Forum: Operazione Doppi Mersennes
2013-09-03, 12:54
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Replies: 495
Views: 46,806
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Forum: Information & Answers
2011-08-10, 04:22
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Replies: 103
Views: 9,367
first guess
Hi!
My English isn't very well, so let us concentrate on the math.
The main problem is determining the probability, that P-1 finds a factor under the condition, that trial factoring didn't.
So...
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Forum: Lounge
2006-12-03, 01:32
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Replies: 118
Views: 8,272
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Forum: Lounge
2006-10-09, 21:08
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Replies: 118
Views: 8,272
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Forum: Computer Science & Computational Number Theory
2006-09-11, 21:53
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Replies: 171
Views: 16,257
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Forum: News
2006-09-04, 19:13
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Replies: 201
Views: 28,257
M44 might be, no, *IS* here
George Woltman on the prime-list:
> A computer has reported finding the 44th known Mersenne prime! I'll
> arrange for a verification run soon. More details will be available
> when the...
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Forum: Miscellaneous Math
2006-07-30, 12:11
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Replies: 20
Views: 1,560
Hi bearnol!
Your "proof" provides nothing,...
Hi bearnol!
Your "proof" provides nothing, and is also false.
First: What do you show?
If your "proof" would be correct, it would only show, that the zeors of the zeta function are lying...
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Forum: Lounge
2006-03-06, 20:33
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Replies: 85
Views: 7,088
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Forum: Lounge
2006-02-18, 12:14
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Replies: 85
Views: 7,088
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Forum: News
2005-12-24, 15:30
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Replies: 265
Views: 27,619
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Forum: Lounge
2005-09-11, 20:02
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Replies: 21
Views: 1,283
Hi ixfd64!
If \pi is random (which is...
Hi ixfd64!
If \pi is random (which is unproven, but most people think so), then you can find every finite string (of numbers) in the decimal expansion of \pi .
cyrix
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Forum: Math
2005-09-11, 19:50
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Replies: 12
Views: 1,254
These two statements are related, yes. But the...
These two statements are related, yes. But the 5^... is stronger, because it uses the litte Fermat, too.
For q=53 the number 5 is a quadratic residue, but M_q does not hold a fermat-test with base...
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Forum: Math
2005-09-11, 18:51
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Replies: 12
Views: 1,254
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Forum: Math
2005-09-11, 17:30
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Replies: 12
Views: 1,254
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Forum: Math
2005-09-11, 15:00
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Replies: 12
Views: 1,254
sorry Tony!
I messed something up. Now in a...
sorry Tony!
I messed something up. Now in a better form:
M_q \equiv 3 \pmod 4 , but since 5 \equiv 1 \pmod 4 the reciprocity law works in the same way, So you can find a solution X with ...
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Forum: Math
2005-09-11, 10:47
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Replies: 12
Views: 1,254
Hi T.Rex!
For prime M_q with q \equiv 1...
Hi T.Rex!
For prime M_q with q \equiv 1 \pmod 4 (and q>1) your conjecture is true: Because of the quadratic reciprocity law (Gauß) 5 is a quadratic residue of M_q , iff M_q is quadratic...
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Forum: Math
2005-09-10, 22:54
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Replies: 12
Views: 1,254
Hi T.Rex!
Your Conjecture is false!
All...
Hi T.Rex!
Your Conjecture is false!
All conditions are equal: R^2+R-1=0 mod M, this means R_{1/2}= -1/2 +- \sqrt{1/4+1}= (-1+-sqrt(5))/2.
For q=5 we have M=31 and sqrt(5)= +-6, thus we have...
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Forum: Riesel Prime Search
2004-12-27, 22:22
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Replies: 599
Views: 34,510
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Forum: Factoring
2004-10-23, 17:14
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Replies: 261
Views: 19,345
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Forum: Prime Sierpinski Project
2004-06-24, 23:06
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Replies: 15
Views: 2,734
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