20211209, 07:16  #342 
"Curtis"
Feb 2005
Riverside, CA
5279_{10} Posts 

20211209, 07:27  #343 
"Viliam Furík"
Jul 2018
Martin, Slovakia
3·251 Posts 

20211209, 09:11  #344 
"Tucker Kao"
Jan 2020
Head Base M168202123
1011011010_{2} Posts 
I think he's using base 21 with 3 and 7 as the primary factors instead of 2 and 5.
Last fiddled with by tuckerkao on 20211209 at 09:13 
20211209, 09:28  #345 
"Matthew Anderson"
Dec 2010
Oregon, USA
3×367 Posts 
look
look _for your information fyi
8191*(1613*(53*(3*5)*157)*2731)=4503599627370495. I only can do this because I have Maple which is a computer language m 
20211209, 10:36  #346 
"TF79LL86GIMPS96gpu17"
Mar 2017
US midwest
1100101001010_{2} Posts 
The least significant digit 5 immediately shows that composite.
52 = 2 x 2 x 13, so 2^{52}1 must be composite, with factors 2^{2}1 = 3 and 2^{13}1 = 8191 among others. https://www.mersenneforum.org/showpo...13&postcount=4 4503 599627 370495 = 3 × 5 × 53 × 157 × 1613 × 2731 × 8191 (using https://www.alpertron.com.ar/ECM.HTM, no need for Maple, Mathematica, pari/GP, etc.) so the corresponding Mn necessarily has factors 7, 31, 2^{53}1, ... and so cannot be a prime. (Seven easily determined factors other than one or itself.) https://www.mersenneforum.org/showpo...13&postcount=4 again. Log 4503 599627 370495 / log 1.47576 ~ 92.61, so if it had been prime, it would be a more likely candidate for exponent of ~Mp#92* than Mp#52*. (See #32 of https://www.mersenneforum.org/showpo...65&postcount=3) To qualify as an April Fool joke it would need to be posted on an April 1. https://timesofindia.indiatimes.com/...w/81820436.cms That's some kind of record worst yet Mp#52* prediction. Please do not try to outdo that. Last fiddled with by kriesel on 20211209 at 11:08 
20211209, 11:52  #347 
Feb 2008
Meath, Ireland
3×61 Posts 
Thank you, Sir!
(note to self: searching for "active guesses" should give you the posts). Last fiddled with by Dr Sardonicus on 20211209 at 13:35 Reason: xignif optsy 
20211209, 15:00  #348 
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
17×619 Posts 

20211209, 15:08  #349 
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
291B_{16} Posts 

20211209, 18:10  #350 
Dec 2020
2·23 Posts 
110235199
December 02, 2022 
20211210, 15:12  #352 
6809 > 6502
"""""""""""""""""""
Aug 2003
101×103 Posts
10100100011011_{2} Posts 
Just for checkpointing purposes. It has been over 3 years since the last MP was found. And the simple calc of how much bigger the current FTC milestone exponent is than M51's exponent is 28.61%

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