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 2018-12-12, 20:19 #2 petrw1 1976 Toyota Corona years forever!     "Wayne" Nov 2006 Saskatchewan, Canada 107718 Posts 87,654,361 December 25, 2019
 2018-12-12, 21:43 #3 ewmayer ∂2ω=0     Sep 2002 República de California 2·5,813 Posts 96000193, May 1st 2021.
 2018-12-12, 22:15 #4 Batalov     "Serge" Mar 2008 Phi(4,2^7658614+1)/2 222578 Posts 110691517 6-19-2022 (optimistic, I know)
2018-12-12, 22:37   #5
masser

Jul 2003

112×13 Posts

Recycling an M50 prediction...

Quote:
 118,788,157 August 8th, 2020.
... and an M51 prediction:

Quote:
 Originally Posted by masser 117003179 November 24, 2022

Last fiddled with by masser on 2018-12-12 at 22:38

 2018-12-14, 13:43 #6 Dylan14     "Dylan" Mar 2017 2·7·41 Posts Exponent: 97,200,647 Date: February 2, 2021
 2018-12-14, 18:10 #7 tServo     "Marv" May 2009 near the Tannhäuser Gate 2×313 Posts December 31, 2019 I am betting that the as the new PRP checking is adopted by more folks, the rate of exponents being tested for compositness will greatly accelerate.
 2018-12-14, 22:25 #8 moebius     Jul 2009 Germany 2·52·11 Posts 87885437 March 30 th 2019 Last fiddled with by moebius on 2018-12-14 at 22:39
2018-12-14, 22:32   #9
Uncwilly
6809 > 6502

"""""""""""""""""""
Aug 2003
101×103 Posts

32·5·211 Posts

Quote:
 Originally Posted by moebius (2^(M51+2000238))-1
That is not a valid guess. Your guess must be a specific prime number. No expressions or ranges. If you decide after M51 is announced to post the equivalent value, you may. But, this counts against your 3 potential guesses. The 60 rule is thus invoked.

 2018-12-14, 22:43 #10 moebius     Jul 2009 Germany 10001001102 Posts Yes I did an mistake and changed it, but your post was faster than my brain. Excuse me.
 2018-12-16, 19:31 #11 Prime95 P90 years forever!     Aug 2002 Yeehaw, FL 22·17·109 Posts Mr. Wagstaff and I predict: M107448181 June 2022

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