nyy 发表于 2023-4-26 13:49:12

713,828,860,473*2^1438+1 is a Factor of 费马数F1436

Apr 21st, 2023
New Fermat factor from Gary Gostin and FermatSearch!
713,828,860,473*2^1438+1 is a Factor of   F1436!!!
Gary Gostin discovered the second Fermat factor of this year!
This factor was discovered on HP Z640 workstation with an E5-2690 v4 CPU and RTX 4070 Ti GPU running gfs.
We now have 362 Fermat factors!
Congratulations to Gary from FermatSearch!

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

迟发了六天,也可能是七天!

713828860473*2^1438+1

nyy 发表于 2023-4-26 13:54:02

这个素数因素,居然有445位,算是比较大的素数因子了。找到这个因子真的很不容易

nyy 发表于 2023-4-26 13:56:07

Clear["Global`*"];(*清除所有变量*)
p=713828860473*2^1438+1 (*因子*)
PrimeQ(*检测一下是否素数*)
(*检测p是否是F1436的因子,如果r=0,那么是因子*)
r=PowerMod+1-p


检验这个因子是否是素数,以及检验这个数是否是F1438的因子的mathematica代码

nyy 发表于 2023-4-26 14:05:12

This factor was discovered on HP Z640 workstation with an E5-2690 v4 CPU and RTX 4070 Ti GPU running gfs.

别人用HP Z640 workstation,我搜索了一下,这玩意居然¥21999,
https://detail.zol.com.cn/workstation/index1142271.shtml

而我却只能用两三千的电脑,难怪别人会发现这些素数因子,
硬件跑不过别人,那是真的不行!

我用的也是小米屌丝手机,虽然我目前对小米手机很满意。
页: [1]
查看完整版本: 713,828,860,473*2^1438+1 is a Factor of 费马数F1436