Read More
Date: 2-3-2020
776
Date: 22-9-2020
3227
Date: 8-11-2020
604
|
A method for computing the prime counting function. Define the function
(1) |
where is the floor function and the are the binary digits (0 or 1) in
(2) |
Legendre's formula can then be written
(3) |
The first few values of are
(4) |
|||
(5) |
|||
(6) |
|||
(7) |
|||
(8) |
|||
(9) |
|||
(10) |
|||
(11) |
Mapes' method takes time , which is slightly faster than the Lehmer-Schur method.
REFERENCES:
Mapes, D. C. "Fast Method for Computing the Number of Primes Less than a Given Limit." Math. Comput. 17, 179-185, 1963.
Riesel, H. "Mapes' Method." Prime Numbers and Computer Methods for Factorization, 2nd ed. Boston, MA: Birkhäuser, p. 23, 1994.
|
|
تفوقت في الاختبار على الجميع.. فاكهة "خارقة" في عالم التغذية
|
|
|
|
|
أمين عام أوبك: النفط الخام والغاز الطبيعي "هبة من الله"
|
|
|
|
|
قسم شؤون المعارف ينظم دورة عن آليات عمل الفهارس الفنية للموسوعات والكتب لملاكاته
|
|
|