mersenneforum.org Where is M40?
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 View Poll Results: Where is M40? Below 20M 15 30.61% Between 20M and 20.39M 11 22.45% The 20.4 range 8 16.33% Between 20.5 and 20.8 11 22.45% Above 20.8 4 8.16% Voters: 49. You may not vote on this poll

 2003-11-18, 14:58 #1 Uncwilly 6809 > 6502     """"""""""""""""""" Aug 2003 101×103 Posts 61·157 Posts Where is M40? A quick poll, where do you all think that M40 falls?
 2003-11-18, 21:21 #2 patrik     "Patrik Johansson" Aug 2002 Uppsala, Sweden 42510 Posts Guessing above 20.8M or VERY slightly below. However, I think the current way of keeping the newly discovered number is good enough---there is (as far as I can see) no way of knowing the prime number, less than running double checks of all numbers returned at the time just before it was discovered. (I'm running three of those now, but hey, we have been discussing random early double checking in the data forum.)
2003-11-18, 22:10   #3
pakaran

Aug 2002

3×83 Posts

Quote:
 Originally posted by patrik Guessing above 20.8M or VERY slightly below. However, I think the current way of keeping the newly discovered number is good enough---there is (as far as I can see) no way of knowing the prime number, less than running double checks of all numbers returned at the time just before it was discovered. (I'm running three of those now, but hey, we have been discussing random early double checking in the data forum.)
That's not necessary. See my comment in the M40 again thread. I also suggest an improvement for next time.

 2003-11-18, 22:58 #4 E_tron     Sep 2002 Austin, TX 10618 Posts Like Prime95 said. It is somewhere between 5 million and 10 million digits .
2003-11-19, 00:17   #5
patrik

"Patrik Johansson"
Aug 2002
Uppsala, Sweden

1A916 Posts

Quote:
 Originally posted by pakaran That's not necessary. See my comment in the M40 again thread. I also suggest an improvement for next time.
I'm not quite sure which post you are referring to. Do you mean that Mersenne primes are listed as unreserved and not getting a phony residue?

But then they would be easier to identify, since then there were only two exponents unreserved, but eight returned during the last hour before the first post of a new prime was made:

Code:
  20000000   20099999             1    21           898   577             3
20100000   20199999            28    13           584   376
20200000   20299999                  15          1386   776
20300000   20399999             5    29      28  1359   829                   1
20400000   20499999             4    41      31  1427   713
20500000   20599999            13    38       2  1560   645
20600000   20699999            17    41          1588   680
20700000   20799999            24    38          1692   521
20800000   20899999            42    41          1884   375
20900000   20999999            52    50       2  2075   114

21000000   21099999            33   375          2139    26
21100000   21199999            48   384       3  2158
21200000   21299999            99   362    1992   228
21300000   21399999           146   327    2151
21400000   21499999            42   377    2268
21500000   21599999            46   267    2190
21600000   21699999            47   383    2265
21700000   21799999            83   396    2218
21800000   21899999            40   307    1782     5
Code:
  20000000   20099999             1    21           897   578             3
20100000   20199999            28    13           584   376
20200000   20299999                  15          1386   776
20300000   20399999             5    29          1386   830                   1
20400000   20499999             4    41       9  1449   713
20500000   20599999            13    39       2  1559   645

20600000   20699999            17    41          1588   680
20700000   20799999            24    38          1691   522
20800000   20899999            42    41          1879   380
20900000   20999999            52    50       2  2071   118

21000000   21099999            33   375       1  2138    26
21100000   21199999            48   384       4  2157
21200000   21299999            99   362    1992   228
21300000   21399999           146   327    2151
21400000   21499999            42   377    2268
21500000   21599999            46   267    2190
21600000   21699999            47   383    2265
21700000   21799999            83   396    2218
21800000   21899999            40   307    1782     5
/edit
And the unreserved... forgot what I was going to say.../edit

Last fiddled with by patrik on 2003-11-19 at 00:26

 2003-11-19, 00:31 #6 patrik     "Patrik Johansson" Aug 2002 Uppsala, Sweden 6518 Posts "The administrator has specified that you can only edit messages for 10 minutes after you have posted. This limit has expired, so you must contact the administrator to make alterations on your message." Well, I was just going to say that the unreserved was not making any progress. (Wow, the 10 minutes counts from the first posting, not from the latest change in the posting?!)
 2003-11-19, 04:23 #7 kwstone     Jun 2003 Shanghai, China 109 Posts Can you add an option to the poll for "between London and Birmingham"? (Sorry, this joke for Brits only)
 2003-11-19, 23:17 #8 Uncwilly 6809 > 6502     """"""""""""""""""" Aug 2003 101×103 Posts 957710 Posts And it appears that in the UK M39 does not exist..... Strange time-space thing????
 2003-11-25, 14:20 #9 Uncwilly 6809 > 6502     """"""""""""""""""" Aug 2003 101×103 Posts 256916 Posts Self-serving bump..