mersenneforum.org  

Go Back   mersenneforum.org > Great Internet Mersenne Prime Search > Data

Reply
 
Thread Tools
Old 2019-11-27, 15:33   #496
Prime95
P90 years forever!
 
Prime95's Avatar
 
Aug 2002
Yeehaw, FL

22×3×587 Posts
Default

Quote:
Originally Posted by GP2 View Post
This was actually discovered yesterday, but for some reason PrimeNet did not send the usual notification.
I got both notifications. Your yahoo address was on the CC list. Spam filter?
Prime95 is offline   Reply With Quote
Old 2019-11-27, 16:02   #497
paulunderwood
 
paulunderwood's Avatar
 
Sep 2002
Database er0rr

1101000010112 Posts
Default

Quote:
Originally Posted by GP2 View Post
The 339th fully-factored or probably-fully-factored 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 exponent 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.


Code:
time echo "print((2^216317-1)/9551099878153/42354904941257/1528559546583299567/6527839497610595205744558551)" | gp -q |./lucasPRP - 1 2 216317 -1
Lucas testing on x^2 - 3*x + 1 ...
Is Lucas PRP!

real	0m18.301s
user	0m18.344s
sys	0m0.012s
paulunderwood is offline   Reply With Quote
Old 2019-11-27, 16:47   #498
ATH
Einyen
 
ATH's Avatar
 
Dec 2003
Denmark

3×5×193 Posts
Default

PFGW concurs:

Code:
Primality testing (2^216317-1)/9551099878153/42354904941257/1528559546583299567/6527839497610595205744558551 [N+1, Brillhart-Lehmer-Selfridge]
Running N+1 test using discriminant 5, base 1+sqrt(5)
Generic modular reduction using generic reduction FMA3 FFT length 21K, Pass1=448, Pass2=48, clm=2 on A 216076-bit number
Calling Brillhart-Lehmer-Selfridge with factored part 0.01%
(2^216317-1)/9551099878153/42354904941257/1528559546583299567/6527839497610595205744558551 is Lucas PRP! (318.0994s+0.0096s)

Last fiddled with by ATH on 2019-11-27 at 16:48
ATH is offline   Reply With Quote
Old 2019-11-27, 18:12   #499
GP2
 
GP2's Avatar
 
Sep 2003

2,579 Posts
Default

Quote:
Originally Posted by Prime95 View Post
I got both notifications. Your yahoo address was on the CC list. Spam filter?
Nope, nothing in the spam folder.

Not a problem, unless it's a symptom of e-mail problems that might crop up again the next time a Mersenne prime is found.
GP2 is offline   Reply With Quote
Old 2019-12-08, 03:41   #500
GP2
 
GP2's Avatar
 
Sep 2003

2,579 Posts
Default

The 340th fully-factored or probably-fully-factored Mersenne number with prime exponent (not including the Mersenne primes themselves) is M3733.

The most recent factor (53 digits) was found by Ryan Propper and the PRP test was done by Yuji Hasegawa. It was the seventh factor for this exponent.


The cofactor has already been certified prime by Primo.

FactorDB link


George let me know about it, since PrimeNet once again did not send the usual notification.
GP2 is offline   Reply With Quote
Old 2019-12-08, 03:48   #501
mathwiz
 
Mar 2019

3·23 Posts
Default

Quote:
Originally Posted by GP2 View Post
George let me know about it, since PrimeNet once again did not send the usual notification.
How does one subscribe to these notifications?
mathwiz is offline   Reply With Quote
Old 2019-12-08, 04:10   #502
GP2
 
GP2's Avatar
 
Sep 2003

2,579 Posts
Default

Quote:
Originally Posted by mathwiz View Post
How does one subscribe to these notifications?
By reading this thread
GP2 is offline   Reply With Quote
Old 2019-12-08, 06:55   #503
Madpoo
Serpentine Vermin Jar
 
Madpoo's Avatar
 
Jul 2014

2×1,637 Posts
Default

Quote:
Originally Posted by GP2 View Post
The 340th fully-factored or probably-fully-factored Mersenne number with prime exponent (not including the Mersenne primes themselves) is M3733.

The most recent factor (53 digits) was found by Ryan Propper and the PRP test was done by Yuji Hasegawa. It was the seventh factor for this exponent.


The cofactor has already been certified prime by Primo.

FactorDB link


George let me know about it, since PrimeNet once again did not send the usual notification.
I didn't think the server emailed out notifications for cofactor PRPs.

Anyway... I was going to mark this one as "cofactor proven" in the database, but it's not showing up in the right place yet, probably because the "PRP" result hasn't had a double-check yet.

I'll check on it later if/when someone submits a verifying run - shouldn't take long I'm sure.
Madpoo is offline   Reply With Quote
Old 2019-12-08, 18:35   #504
ATH
Einyen
 
ATH's Avatar
 
Dec 2003
Denmark

289510 Posts
Default

Another one factored by Ryan Propper and tested by mrh: https://mersenne.org/M3467

https://mersenneforum.org/showthread.php?t=24989

Last fiddled with by ATH on 2019-12-08 at 18:36
ATH is offline   Reply With Quote
Old 2019-12-08, 21:53   #505
GP2
 
GP2's Avatar
 
Sep 2003

2,579 Posts
Default

The 341st fully-factored or probably-fully-factored Mersenne number with prime exponent (not including the Mersenne primes themselves) is M3467.

The most recent factor (55 digits) was found by Ryan Propper and the PRP test was done by mrh.

The cofactor has already been certified prime by Primo.

FactorDB link
GP2 is offline   Reply With Quote
Old 2020-01-18, 04:48   #506
GP2
 
GP2's Avatar
 
Sep 2003

2,579 Posts
Default

The 342nd fully-factored or probably-fully-factored Mersenne number with prime exponent (not including the Mersenne primes themselves) is M2887.

The most recent factor (56 digits) was found by Ryan Propper and the PRP test was done by Niels_Mache_Nextcloud.

The cofactor has already been certified prime.

FactorDB link
GP2 is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Smallest exponent for mersenne not-factored preda PrimeNet 10 2018-11-04 00:47
Largest Mersenne Number Fully Factored? c10ck3r Data 49 2017-12-10 19:39
Possibility of a Fully-Factored Number Trejack FactorDB 7 2016-05-14 05:38
Estimating the number of primes in a partially-factored number CRGreathouse Probability & Probabilistic Number Theory 15 2014-08-13 18:46
Number of distinct prime factors of a Double Mersenne number aketilander Operazione Doppi Mersennes 1 2012-11-09 21:16

All times are UTC. The time now is 10:57.

Sat Aug 15 10:57:44 UTC 2020 up 2 days, 7:33, 0 users, load averages: 1.77, 1.59, 1.43

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.