20191011, 15:40  #485 
Sep 2003
2589_{10} Posts 
The 336th fullyfactored or probablyfullyfactored Mersenne number with prime exponent (not including the Mersenne primes themselves) is M2441.
The 49digit most recent factor was found by Ryan Propper and the PRP test was done by mnd9. The cofactor has already been certified prime: FactorDB link 
20191011, 18:38  #486 
1976 Toyota Corona years forever!
"Wayne"
Nov 2006
Saskatchewan, Canada
121A_{16} Posts 
Ryan and P1 and 12
Is it fluke or intentionally chosen B1/B2 that all of Ryan's recent P1 results have a GhzDays ending in .xx12?
14.1712 if B1 and B2 required 6.1412 if found via B1 only. Ryan Propper Manual testing 98454437 FPM1 20191011 14:00 0.3 14.1712 Factor: 124390959709723920942323644574431 / (P1, B1=965000, B2=24125000, E=6) Ryan Propper Manual testing 98433241 FPM1 20191011 14:00 0.3 6.1412 Factor: 102501238638612689076865713323434384005097 / (P1, B1=965000) and about 100 more ending in .xx12 
20191012, 03:53  #487 
Jun 2003
4960_{10} Posts 
Fluke. Same B1/B2 and same FFT size = same credit. Stage1only credit matching full pm1 credit is fluke.
I don't think ryanp gives a flying fox about GIMPS credit, let alone gimmicky credits. 
20191018, 14:41  #488 
Sep 2003
101000011101_{2} Posts 
The 337th fullyfactored or probablyfullyfactored Mersenne number with prime exponent (not including the Mersenne primes themselves) is M2351.
The 55digit most recent factor was found by Ryan Propper and the PRP test was done by Fan Ming. Note that Ryan had found a 52digit factor for the same exponent just six days earlier. FactorDB link Last fiddled with by GP2 on 20191018 at 14:42 
20191018, 17:06  #489  
"Will Edgington"
Nov 2010
Utah, USA
18_{16} Posts 
I noticed the proof of the cofactor had still not been done, so I did it and uploaded it just now.
 Will Quote:


20191018, 18:54  #490  
Jun 2019
Boston, MA
3·13 Posts 
Quote:


20191018, 20:01  #491  
Sep 2003
3·863 Posts 
Quote:
So priority of the PRP discoveries for tiny exponents is problematic. I just mention the person who reported it to Primenet first. 

20191024, 15:00  #492 
Oct 2019
5·19 Posts 

20191029, 14:10  #493 
Sep 2003
3×863 Posts 
The 338th fullyfactored or probablyfullyfactored Mersenne number with prime exponent (not including the Mersenne primes themselves) is M1723.
The 51digit most recent factor was found by Ryan Propper and the PRP test was done by mnd9. The cofactor is already certified prime. For cofactors this small, FactorDB does the PRP test automatically and certification is done routinely and quickly. The factor had already been submitted to FactorDB, perhaps by Ryan himself. FactorDB link 
20191029, 23:18  #494  
Nov 2003
1D24_{16} Posts 
Quote:
It would also be nice if people could factor some on the numbers within the Cunningham numbers instead of only cherry picking relatively untested numbers outside the tables. Yes, the former is a lot harder. "We choose to go to the moon and do the other thing. Not because they are easy, but because they are hard". 

20191127, 15:25  #495 
Sep 2003
3·863 Posts 
The 339th fullyfactored or probablyfullyfactored Mersenne number with prime exponent (not including the Mersenne primes themselves) is M216317.
The most recent factor was found by Niels_Mache_Nextcloud and the PRP test was done by mnd9. This cofactor is too big to be certified prime by Primo. FactorDB link This was actually discovered yesterday, but for some reason PrimeNet did not send the usual notification. Last fiddled with by GP2 on 20191208 at 04:34 Reason: wording: cofactor 
Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Smallest exponent for mersenne notfactored  preda  PrimeNet  10  20181104 00:47 
Largest Mersenne Number Fully Factored?  c10ck3r  Data  49  20171210 19:39 
Possibility of a FullyFactored Number  Trejack  FactorDB  7  20160514 05:38 
Estimating the number of primes in a partiallyfactored number  CRGreathouse  Probability & Probabilistic Number Theory  15  20140813 18:46 
Number of distinct prime factors of a Double Mersenne number  aketilander  Operazione Doppi Mersennes  1  20121109 21:16 