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发表于 2017-12-6 01:27:25
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2017-12-04: PrimeGrid, GFN-262144 Mega Prime!
On 3 December 2017, 06:30:24 UTC, PrimeGrid?s Generalized Fermat Prime Search found the Generalized Fermat mega prime:
3673932^262144+1
The prime is 1,721,010 digits long and enters Chris Caldwell's The Largest Known Primes Database ranked 6th for Generalized Fermat primes and 53rd overall.
The discovery was made by Sean Humphries (No.15) of the United States using an AMD Radeon RX Vega in an AMD Ryzen 7 1800X CPU with 32GB RAM, running Microsoft Windows 10 Professional Edition. This GPU took about 24 minutes to probable prime (PRP) test with GeneferOCL5. Sean is a member of the Overclock.net team.
The prime was verified on 3 December 2017, 07:29:36 UTC by Wolfgang Schwieger (DeleteNull) of Germany using an NVidia GeForce GTX Titan Black GPU in an Intel(R) Core(TM) i7-6700K CPU at 4.00GHz with 32GB RAM, running Linux. This GPU took about 27 minutes to probable prime (PRP) test with GeneferOCL5. Wolfgang is a member of the SETI.Germany team.
The PRP was confirmed prime by an Intel(R) Core(TM) i7-7700K CPU @ 4.20GHz with 16GB RAM, running Microsoft Windows 10 Professional Edition. This computer took about 5 hours 45 minutes to complete the primality test using multithreaded LLR.
For more details, please see the official announcement.
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2017.12.04 前两天刚发现的那个排名第六的广义费马数被挤下去啦2333
最大广义费马数排行榜第六名的宝座现在由3673932^262144+1占领! (掩面,3596074^262144+1 上位才不到一个月就被干下去了,我还以为看错新闻。。
这个广义费马数有一百七十二万一千零一十位数字(比之前的第六名多了2438位!
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2017-12-05: PrimeGrid, Another PPS-Mega Prime!
On 3 December 2017, 20:54:51 UTC, PrimeGrid?s PPS Mega Prime Search project found the Mega Prime:
1065*2^3447906+1
The prime is 1,037,927 digits long and will enter Chris Caldwell's The Largest Known Primes Database ranked 210th overall.
The discovery was made by Juan C. Toledo (Meithan West) of Mexico using an Intel(R) Core(TM) i7-4790 CPU @ 3.60GHz with 8GB RAM, running Linux. This computer took about 1 hour 48 minutes to complete the primality test using LLR. Juan is a member of the UNAM ? Universidad Nacional Autonoma de Mexico team.
The prime was verified on 3 December 2017, 22:23:34 UTC by Lucas Brown (LucasBrown) of the United States using an Intel(R) Core(TM) i7-6700K CPU @ 4.00GHz with 64GB RAM, running Linux. This computer took about 48 minutes to complete the primality test using LLR. Lucas is a member of the XKCD team.
For more details, please see the official announcement.
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2017.12.05 又一个巨大的普罗斯素数!
本月3号,PrimeGird 的子项目Proth Prime Search 找到了这个巨大的素数:
1065*2^3447906+1
该素数有一百零三万七千九百二十七位,在已知所有素数中排名第210.(最近新发现的素数好像都是这个位置左右。。
发现者和验证信息就不译了,老看土豪们的配置也没啥意思。。
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