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 2005-11-09, 11:23 #100 em99010pepe     Sep 2004 2×5×283 Posts Latest news. M3321932947 has a factor: 998263250453731877623 Should I keep testing up to 71 bits. Need advice. I have a class within 4 hours. Carlos Last fiddled with by em99010pepe on 2005-11-09 at 11:29
2005-11-09, 11:41   #101
ET_
Banned

"Luigi"
Aug 2002
Team Italia

2·2,383 Posts

Quote:
 Originally Posted by em99010pepe Latest news. M3321932947 has a factor: 998263250453731877623 Should I keep testing up to 71 bits. Need advice. I have a class within 4 hours. Carlos
We usually did so. But you are not forced, just reach the next integer bit depth and let us know.

Luigi

2005-11-09, 11:44   #102
em99010pepe

Sep 2004

B0E16 Posts

Quote:
 Originally Posted by ET_ We usually did so. But you are not forced, just reach the next integer bit depth and let us know. Luigi
Right now it is in the 69.802 bit. I can stop on 70 bit depth. Is it possible to have more than one factor? If so I will finish up to 71 bits.

Carlos

Last fiddled with by em99010pepe on 2005-11-09 at 11:46

2005-11-09, 11:51   #103
ET_
Banned

"Luigi"
Aug 2002
Team Italia

2×2,383 Posts

Quote:
 Originally Posted by em99010pepe Right now it is in the 69.802 bit. I can stop on 70 bit depth. Is it possible to have more than one factor? If so I will finish up to 71 bits. Carlos
Yes, it is, although it's unlikely. Some of us have had up to three factors for the same exponent at lower bit depths.
Mind that the higher the bit depth, the lower the probability to find (more than) one factor.

Luigi

 2005-11-09, 11:53 #104 em99010pepe     Sep 2004 2×5×283 Posts Ok. Taking the number up to 71 bits. End of story. Carlos
2005-11-09, 13:41   #105
OmbooHankvald

May 2005
Copenhagen, Denmark

4418 Posts

Quote:
 Originally Posted by em99010pepe M3321932947 has a factor: 998263250453731877623 Should I keep testing up to 71 bits. Need advice. I have a class within 4 hours.
A quick guess: No. If a number has a factor then that number is eliminated and there is no reason to test it further.
(At least that's how it is done in 100MDPP....)

Last fiddled with by OmbooHankvald on 2005-11-09 at 13:42

2005-11-09, 14:32   #106
ET_
Banned

"Luigi"
Aug 2002
Team Italia

2·2,383 Posts

Quote:
 Originally Posted by OmbooHankvald A quick guess: No. If a number has a factor then that number is eliminated and there is no reason to test it further. (At least that's how it is done in 100MDPP....)
OBD leaves the decision to the prover

Note that it is easier to factorize a number knowing more than one factor, and there is someone who collects Mersenne factors.

Luigi

 2005-11-09, 14:52 #107 em99010pepe     Sep 2004 283010 Posts OmbooHankvaid, As Luigi said that's my call. Period. Carlos
2005-11-10, 03:47   #108
wblipp

"William"
May 2003
New Haven

2×32×131 Posts

Quote:
 Originally Posted by em99010pepe M3321932947 has a factor: 998263250453731877623 Should I keep testing up to 71 bits. Need advice. I have a class within 4 hours.
This factor is about 269.75, so my advice would be to continue until 70. I like leaving round end points for future searchers that may decide to look for additional factors. But this whole project is so silly that it's pointless to argue anything really makes a difference. Do what you want, just let us know your choice.

 2005-11-10, 10:49 #109 em99010pepe     Sep 2004 2×5×283 Posts Final result and end of discussion: M3321932947 has a factor: 998263250453731877623 M3321932947 no factor from 67.000 bits to 71.000 bits. Trying to take M3321928373 from 72 to 74 bits. Carlos Last fiddled with by em99010pepe on 2005-11-10 at 10:51
 2005-11-10, 14:26 #110 ellisonch   Nov 2005 610 Posts I'd like to take exponent 3321928307 from 73 to 74.

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