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2003-12-11, 19:16
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#1 |
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Dec 2003
3 Posts |
prime number formula
The result of 2, raised to the power of a prime number, less 1 equals another prime number.
There is always one larger. |
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2003-12-11, 19:32
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#2 |
Aug 2002
22·5·13 Posts |
Not absolutely correct. The vast majority of them do not generate prime numbers. That is why we have found only 40 of them so far, even though we have been at it for a fairly long time....
PM |
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2003-12-11, 19:36
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#3 |
Aug 2002
2×7×13×47 Posts |
11 is prime...
211-1 = 2047 2047 = 23 × 89 |
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2003-12-11, 19:52
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#4 |
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Dec 2003
3 Posts |
prime number formula
http://www.utm.edu/research/primes/l...mall/10000.txt
there are over 10,000 primes. pi(x) = the number of primes less than or equal to x. There are only 39 known Mersenne primes ... http://www.pen.k12.va.us/Div/Winches...cts/prime.html However, even that appears to follow the aforemetioned formula. |
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2003-12-11, 19:56
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#5 |
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Dec 2003
3 Posts |
11 good catch
true.
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2003-12-11, 19:58
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#6 |
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Aug 2002
22×5×13 Posts |
The Mersenne primes follow the 2P-1 where P is a prime.
The GIMPS project is more or less systematically testing primes to see if they will generate a new Mersenne prime. PM |
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2003-12-11, 20:21
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#7 |
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4,493 Posts |
Thanks.
Thanks.
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