问个数学问题 素数的
人们至今发现了多少以内的所有素数？
我在网上搜索到的只有September 17, 2004: All exponents below 9,000,000 double-checked.是2^9000000以内的所有梅森素数，但不清楚是否就是这以内的所有素数？
(http://www.mersenne.org/status.htm)
如果有什么好的关于素数的网站或论坛，请推荐一下，谢谢了[百及子 (10-30 19:48, Long long ago)]
[ 传统版 |
sForum ][登录后回复]1楼
When 2n-1 is prime it is said to be a Mersenne prime<a href="http://www.utm.edu/research/primes/programs/music/listen/" style="text-decoration:underline;">This one might be good :-)</a>[莫见愁 (10-30 20:16, Long long ago)] [ 传统版 | sForum ][登录后回复]2楼
(引用 莫见愁:When 2n-1 is prime it is said to be a Mersenne primeThis one might be good :-)...)correction--> 2^n - 1This one might be good :-)[莫见愁 (10-30 20:33, Long long ago)] [ 传统版 | sForum ][登录后回复]3楼
(引用 莫见愁:When 2n-1 is prime it is said to be a Mersenne primeThis one might be good :-)...)果然有趣我也去过这个网站，怎么就没发现呢？
老外就是有趣，我都死读书了[百及子 (10-30 20:44, Long long ago)]
[ 传统版 |
sForum ][登录后回复]4楼
http://www.utm.edu/research/primes/[icky (10-30 21:36, Long long ago)] [ 传统版 | sForum ][登录后回复]5楼
(引用 icky:http://www.utm.edu/research/primes/)这个站不错[icky (10-30 21:37, Long long ago)] [ 传统版 | sForum ][登录后回复]6楼
自力更生艰苦创业http://numbers.computation.free.fr/Constants/Primes/Pix/pixproject.html
PI(x) project 比较老，不过数字够可观的了，不知道现在发展到哪个阶段了
随便找了个，贴在这留做参考 pi(4×10^22) = 783,964,159,847,056,303,858
估计50位十进制数字以内的全部素数还没找齐，呵呵[百及子 (10-30 22:08, Long long ago)]
[ 传统版 |
sForum ][登录后回复]7楼
Whenever you need you can compute, right?[香陵居士 (10-31 1:06, Long long ago)] [ 传统版 | sForum ][登录后回复]8楼
(引用 香陵居士:Whenever you need you can compute, right?)i compute, or u compute?o no
no single man can compute the number of prime numbers below 10^23 yet; or even u can, or have optimized algorithm, it will take at least months
i am just wondering how far man has gone in the way of searching prime numbers
those predicted to be prime numbers are not within my interest yet[百及子 (10-31 20:27, Long long ago)]
[ 传统版 |
sForum ][登录后回复]9楼
(引用 百及子:i compute, or u compute?o no no single man can compute the number of prime numbers below 10^23 yet; or even u can, or have opti...)But I think that's a not so important qJust depend on how much time you want to take to generate the table. If to generate such a number is really so important to someone, he may consider to build a super computer or use grid computing to generate it. And with the development of the processors the time will be shorter.[香陵居士 (10-31 21:37, Long long ago)] [ 传统版 | sForum ][登录后回复]10楼