mersenneforum.org "Interesting" post from the mailing list
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2015-05-02, 22:49   #1
Dubslow

"Bunslow the Bold"
Jun 2011
40<A<43 -89<O<-88

3·29·83 Posts
"Interesting" post from the mailing list

(Not sure what forum... could plausibly be several different fora)

Quote:
 Originally Posted by Jonas Castillo Toloza to: mersenne-users@mailman.list24.ch date: Sat, May 2, 2015 at 5:37 PM subject: [mersenne-users] New Mersenne primes Greetings to all members of the mailing list. A friend of mine said to have discovered a new method to test "Mersenne prime numbers", but he did not want to use GIMPS to check. (2 ^ p) -1 is a prime number for p = 89335541 p = 119898941 p = 192300593 p = 241910377 p = 268777297 p = 285754177 p = 290294033 p = 315690521

 2015-05-02, 22:54 #2 Batalov     "Serge" Mar 2008 Phi(4,2^7658614+1)/2 3×43×73 Posts It could plausibly be only in one forum. FTFY
 2015-05-02, 22:59 #3 R. Gerbicz     "Robert Gerbicz" Oct 2005 Hungary 2·733 Posts 205354275925112609 | 2^89335541-1
2015-05-03, 01:59   #4
Uncwilly
6809 > 6502

"""""""""""""""""""
Aug 2003
101×103 Posts

225238 Posts

Quote:
 Originally Posted by Dubslow (Not sure what forum... could plausibly be several different fora)
M119898941 has a factor 169776900457 (37 bits)
M192300593 has a factor 134074301045977673 (56 bits)
M241910377 has a factor 30480707503 (34 bits)
M268777297 no known factors to 66 bits
M285754177 no known factors to 66 bits
M290294033 has 2 factors 24965286839 & 4266161108969 (both less than 42 bits)
M315690521 no known factors to 66 bits

5 fails out of 8 proposed primes. Seems to be a bad method.

2015-05-03, 02:21   #5
retina
Undefined

"The unspeakable one"
Jun 2006
My evil lair

22·5·307 Posts

Quote:
 Originally Posted by Uncwilly 5 fails out of 8 proposed primes. Seems to be a bad method.
No no no. You just don't get it. You see if one claims enough numbers are prime then eventually they get lucky with a real prime, and then they are famous. Even if they never tested any of them it is a potential way to claim that they discovered the prime when it eventually comes up. So actually it is a good method: just keep claiming more and more of these as prime and then you'll get credit for the awesome find when it happens.

 2015-05-04, 18:34 #6 BudgieJane     "Jane Sullivan" Jan 2011 Beckenham, UK 251 Posts Doesn't "A friend of mine" in this type of post really mean "I"?
2015-05-04, 18:39   #7
Batalov

"Serge"
Mar 2008
Phi(4,2^7658614+1)/2

941710 Posts

Quote:
 Originally Posted by retina No no no. You just don't get it. You see if one claims enough numbers are prime then eventually they get lucky with a real prime, and then they are famous. Even if they never tested any of them it is a potential way to claim that they discovered the prime when it eventually comes up. So actually it is a good method: just keep claiming more and more of these as prime and then you'll get credit for the awesome find when it happens. See here for more information: http://www.mersenneforum.org/showpos...9&postcount=39
Brilliant as usual, Sir!

And I know that some imitators of this clever plan already learned' from your wisdom.

 2015-05-04, 22:15 #8 Uncwilly 6809 > 6502     """"""""""""""""""" Aug 2003 101×103 Posts 3×5×72×13 Posts Cochet tried this repeatedly.
2015-05-04, 22:55   #9
TheMawn

May 2013
East. Always East.

11×157 Posts

Quote:
 Originally Posted by BudgieJane Doesn't "A friend of mine" in this type of post really mean "I"?

2015-05-05, 07:04   #10
ewmayer
2ω=0

Sep 2002
República de California

22·32·17·19 Posts

Quote:
 Originally Posted by Batalov And I know that some imitators of this clever plan already learned' from your wisdom.
One would think the clever planners would have learned to at least do some decently deep TF on their laundry list by now. (But we appreciate the laziness/carelessness).

2015-05-05, 08:56   #11
retina
Undefined

"The unspeakable one"
Jun 2006
My evil lair

22·5·307 Posts

Quote:
 Originally Posted by ewmayer One would think the clever planners would have learned to at least do some decently deep TF on their laundry list by now. (But we appreciate the laziness/carelessness).
Well they don't need to. Plenty of people here seem willing to do that work for them. Leverage of other people's resources is all part of the clever plan.

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