"Interesting" post from the mailing list
 

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

[quote=Jonas Castillo Toloza <phimilenario@gmail.com>]
to: [email]mersenne-users@mailman.list24.ch[/email]
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[/quote]

It could plausibly be only in one forum.
FTFY

205354275925112609 | 2^89335541-1

[QUOTE=Dubslow;401547](Not sure what forum... could plausibly be several different fora)[/QUOTE]
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.

[QUOTE=Uncwilly;401554]5 fails out of 8 proposed primes. Seems to be a bad method.[/QUOTE]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 [i]good[/i] 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: [url]http://www.mersenneforum.org/showpost.php?p=221659&postcount=39[/url]

Doesn't "A friend of mine" in this type of post really mean "I"?

[QUOTE=retina;401555]No no no. You just don't get it. You see[B] 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[/B]. So actually it is a [i]good[/i] 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: [url]http://www.mersenneforum.org/showpost.php?p=221659&postcount=39[/url][/QUOTE]
Brilliant as usual, Sir! :tu:

And I know that some [URL="http://www.mersenneforum.org/showthread.php?p=401474#post401474"]imitators of this clever plan[/URL] already `learned' from your wisdom.

[URL="http://www.mersenneforum.org/search.php?searchid=1622530"]Cochet[/URL] tried this repeatedly.

[QUOTE=BudgieJane;401665]Doesn't "A friend of mine" in this type of post really mean "I"?[/QUOTE]

:goodposting:

[QUOTE=Batalov;401666]And I know that some [URL="http://www.mersenneforum.org/showthread.php?p=401474#post401474"]imitators of this clever plan[/URL] already `learned' from your wisdom.[/QUOTE]

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).

[QUOTE=ewmayer;401722]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).[/QUOTE]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.