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Old 2015-05-02, 22:49   #1
Dubslow
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Quote:
Originally Posted by Jonas Castillo Toloza <phimilenario@gmail.com>
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
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Old 2015-05-02, 22:54   #2
Batalov
 
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It could plausibly be only in one forum.
FTFY
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Old 2015-05-02, 22:59   #3
R. Gerbicz
 
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205354275925112609 | 2^89335541-1
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Old 2015-05-03, 01:59   #4
Uncwilly
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Quote:
Originally Posted by Dubslow View Post
(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.
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Old 2015-05-03, 02:21   #5
retina
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Quote:
Originally Posted by Uncwilly View Post
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.

See here for more information: http://www.mersenneforum.org/showpos...9&postcount=39
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Old 2015-05-04, 18:34   #6
BudgieJane
 
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Doesn't "A friend of mine" in this type of post really mean "I"?
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Old 2015-05-04, 18:39   #7
Batalov
 
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Quote:
Originally Posted by retina View Post
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.
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Old 2015-05-04, 22:15   #8
Uncwilly
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Cochet tried this repeatedly.
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Old 2015-05-04, 22:55   #9
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Quote:
Originally Posted by BudgieJane View Post
Doesn't "A friend of mine" in this type of post really mean "I"?
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Old 2015-05-05, 07:04   #10
ewmayer
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Quote:
Originally Posted by Batalov View Post
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).
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Old 2015-05-05, 08:56   #11
retina
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Quote:
Originally Posted by ewmayer View Post
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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