20181216, 23:43  #12 
"Rashid Naimi"
Oct 2015
Remote to Here/There
7C0_{16} Posts 
Sounds like you have already planned your vacation details for year.
Last fiddled with by a1call on 20181216 at 23:43 
20181221, 14:07  #13 
"Brian"
Jul 2007
The Netherlands
7×467 Posts 
258150181
15 August 2027 
20181221, 17:33  #14 
Jun 2003
2^{3}×607 Posts 
94029857  Mar 17, 2021
107054317  Aug 31, 2023 121882903  Jul 12, 2026 
20181221, 21:20  #15 
"TF79LL86GIMPS96gpu17"
Mar 2017
US midwest
3^{2}·5·109 Posts 
Using a variation of the strikingly consistent methodology for guessing M51, to make predictions about M52:
Code:
ID Ballpark Basis of ballpark Guess exp Mod 8 Date guess 52a 88,318,521 ratio of previous two 88318673 1 Jun 14, 2019 Flag Day 52b 121,882,920 Approx expected ratio 1.47576*p51 121882753 1 May 21, 2025 Assuming 6 million/year first test range covered 52c 402,143,506 A long stride, 521/107*p51 402143633 1 Mar 12, 2052 " " They have fractions of interior ones bits averaging 0.468, near the trend for higher known Mersenne prime exponents (0.479 overall and declining). The methodology for predicting M51 was 100% consistent in selecting exponents that did not produce M1, and at least 2 out of 3 did not predict prime numbers. (What's 40 years of hunting, beginning with a programmable calculator to play with the low end.) I predict M52 will be none of these new guesses. If I squint a bit, it looks a little like Murphy of Murphy's law making a certain hand gesture in GP2's right digit hexadecimal histogram. But hey, we're in it for the fun and learning, not fame or fortune. Last fiddled with by kriesel on 20181221 at 21:30 
20181221, 22:27  #16 
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
2^{3}×7×167 Posts 

20181221, 23:18  #17 
"TF79LL86GIMPS96gpu17"
Mar 2017
US midwest
3^{2}·5·109 Posts 
See the "guess exp" column for 3 guesses of exponent value (decimal). "Date guess" column for their respective date guesses.
Last fiddled with by kriesel on 20181221 at 23:20 
20181221, 23:39  #18  
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
2^{3}×7×167 Posts 
Quote:
Last fiddled with by Uncwilly on 20181221 at 23:40 

20181222, 06:32  #19 
"Mihai Preda"
Apr 2015
2×11×61 Posts 
87000929
20191201 
20181222, 11:41  #20  
"TF79LL86GIMPS96gpu17"
Mar 2017
US midwest
3^{2}·5·109 Posts 
Quote:
Also took the time to carefully align the character cells in the code section this time, for ease of read/clarity, which does not just happen by itself when copy/paste from a spreadsheet is used. Plus the usual care in spelling and grammar. I don't know what happened to the 5 I typed in "did not produce M1" that should read "did not produce M51"; not a moderator myself so can't go back and fix it now. Guessing here, because I see a lot of variation in others' posts, without objection, that the preferred or required form is something like no more than about ten words of explanatory leading text, and one or more sets of exponent_guess date_guess "entered as your guesses" Entered as what, in what? If you're gathering them into a spreadsheet, it would make sense for the guesses to be formatted in our posts to make that easier, not harder. A spaceseparated table might be easiest. (maybe a header line) exp1 date1 exp2 date2 exp3 date3 Or perhaps: username exp1 date1 username exp2 date2 username exp3 date3 Last fiddled with by kriesel on 20181222 at 12:26 

20181222, 12:06  #21  
"TF79LL86GIMPS96gpu17"
Mar 2017
US midwest
3^{2}·5·109 Posts 
Quote:
12. Exponent guesses shall be expressed as integer decimal constants, without punctuation (no embedded comma, period, or space). 

20181223, 13:00  #22 
Dec 2018
China
2^{3}×5 Posts 
85615531 Oct. 2019
87946949 Oct. 2019 92074531 Oct. 2019 I guess the next prime is close to the current M51 we found I tried 3 different distance... and don't know whether it would work 
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