623619365837*2^1495 + 1 divides 费马数F1493

nyy

623619365837*2^1495 + 1 divides F1493

Feb 15th, 2023
New Fermat factor from Gary Gostin and FermatSearch!
623,619,365,837  . 21495+1 is a Factor of   F1493!!!
Gary Gostin discovered the first Fermat factor of this year, after a dry spell lasted 14 months!
This factor was discovered on HP Z640 workstation with an E5-2690 v4 CPU and RTX 4070 Ti GPU running gfs.
We now have 361 Fermat factors!
Congratulations to Gary from FermatSearch!

http://www.fermatsearch.org/news.html

nyy

2021年发现了五个费马因子，2022年一个没有，直到2023年有了一个新的！看来越来越难了！


Nov 24th, 2021
New Fermat factor from Gary Gostin and FermatSearch!
205071338665  . 21382+1 is a Factor of   F1379!!!
Gary Gostin discovered the fifth Fermat factor of this year!
This was discovered on an Intel i9-9900K CPU with an RTX 2080 GPU running a new GPU-based factoring program.
We now have 360 Fermat factors known, one for each degree of the circle!
Congratulations to Gary from FermatSearch!
-
Aug 12th, 2021
New Fermat factor from Erwin Doescher and FermatSearch!
749893 . 266648+1 is a Factor of   F66643!!!
Erwin Doescher discovered the fourth Fermat factor of this year!
This factor was discovered on an AMD RYZEN 3900X with RTX 3070 graphics card.
Erwin is running his own GPU based siever LLR for primality testing and PFGW, which incorporates George Woltman's gwnum library.
Congratulations to Erwin from FermatSearch, for his first factor, we now have 359 Fermat factors known!
-
March 4th, 2021
New Fermat factor from Gostin and FermatSearch!
14698299 . 225602+1 is a Factor of   F25599!!!
Gary Gostin discovered the third Fermat factor of this year!
This was discovered on an AMD EPYC 7702P based server running pmfs which incorporates George Woltman's gwnum library.
Congratulations to Gary from FermatSearch, for his 85th factor, we now have 358 Fermat factors known!
-
March 1st, 2021
New Fermat factor from Luigi Morelli!
74327396788321657 . 242+1 is a Factor of   F40!!!
Miracles happen from time to time... and I discovered the second Fermat factor of this year on my birthday's week!
The factor has 30 digits, and was found using a Intel 9800x with a Nvidia RTX2060 and the program mmff from George Woltman.
Congratulations to FermatSearch, we now have 357 Fermat factors known!
-
January 16th, 2021
New Fermat factor from Tom Greer and PrimeGrid!
27 . 27963247+1 is a Factor of   F7963245!!!
Tom Greer and PrimeGrid discovered the first Fermat factor of this year!
With 2,397,178 digits, it is the second biggest known factor for Fermat numbers.
Congratulations to Tom from FermatSearch, for his factor, we now have 356 Fermat factors known!

nyy

October 5th, 2020
New Fermat factor from Ryan Propper!
7*2^18233956+1 is a Factor of   F18233954!!!
Ryan Propper discovered the fourth Fermat factor of this year!
Congratulations to Ryan from FermatSearch, for his 2nd factor, we now have 354 Fermat factors known!

这是目前发现的最大的费马数的素数因子！这个素数因子有548_8969位整数
真的是非常大了！