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 2008-07-28, 20:52 #34 lavalamp     Oct 2007 Manchester, UK 2·3·227 Posts Taking 245 - 250 T.
 2008-07-31, 12:20 #35 lavalamp     Oct 2007 Manchester, UK 2×3×227 Posts Returning 240 - 245 T, 6 factors found. Taking 250 - 255 T. Last fiddled with by lavalamp on 2008-07-31 at 12:20
 2008-08-07, 07:38 #36 ValerieVonck     Mar 2004 Belgium 22·211 Posts 255 - 260 T - CedricVonck - Reserved
2008-08-11, 23:13   #37
philmoore

"Phil"
Sep 2002
Tracktown, U.S.A.

3×373 Posts

Quote:
 Originally Posted by lavalamp In the Excel file that you attached, where does the 1.781 come from used in calculation 1? I tried and failed to see anything special about that number that would warrant it being there. When calculating the odds for a Mersenne prime that number is a 2, because you only need to trial factor up to half the bit depth of the candidate (square root) to prove primality (not that anyone would or could prove primality by that method for the 10m digit candidates).

e to gamma, the Euler-Mascheroni constant, check out:
http://mathworld.wolfram.com/MertensTheorem.html

 2008-08-16, 22:49 #38 lavalamp     Oct 2007 Manchester, UK 55216 Posts Returning 250 - 255 T, 5 factors found. Taking 260 - 265 T.
 2008-08-17, 16:55 #39 ValerieVonck     Mar 2004 Belgium 22·211 Posts 255 - 260 T in progress CedricVonck => Range done 4 factors found and submitted
 2008-08-17, 17:19 #40 lavalamp     Oct 2007 Manchester, UK 25228 Posts Cool thanks, factors received. You sell yourself short though, you found 25% more than that. Last fiddled with by lavalamp on 2008-08-17 at 17:19
 2008-08-25, 13:33 #41 lavalamp     Oct 2007 Manchester, UK 25228 Posts Taking 265 - 270 T and 270 - 275 T. Last fiddled with by lavalamp on 2008-08-25 at 13:34
 2008-08-26, 22:35 #42 lavalamp     Oct 2007 Manchester, UK 2×3×227 Posts Returning 245 - 250 T, 6 factors found.
 2008-09-04, 06:43 #43 lavalamp     Oct 2007 Manchester, UK 2·3·227 Posts Returning 265 - 270 T, 7 factors found. Taking 275 - 280 T.
 2008-09-04, 06:50 #44 em99010pepe     Sep 2004 54168 Posts Probably a 10M prime was found on GIMPS so will you keep sieving? Thanks in advance.

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