Sum of prime numbers

Compute the sum of all prime numbers in a stream of binary integers as fast as possible.

Input: 1 000 000 uint32 values in little-endian binary on STDIN (4 bytes each).

Output: The uint64 sum of all values that are prime, printed as a decimal string.

Restrictions:30s256Mb 1 Score Packages

Feel free to create an issue if you need an extra library from the standard Ubuntu repository.

Name	Version	Description
libc6-dev	2.39-0ubuntu8.7	GNU C Library: Development Libraries and Header Files Contains the symlinks, headers, and object files needed to compile and link programs which use the standard C library.
libclang-common-14-dev	1:14.0.6-19build4	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-15-dev	1:15.0.7-14build3	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-16-dev	1:16.0.6-23ubuntu4	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-17-dev	1:17.0.6-9ubuntu1	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-18-dev	1:18.1.3-1ubuntu1	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-19-dev	1:19.1.1-1ubuntu1~24.04.2	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-20-dev	1:20.1.2-0ubuntu1~24.04.2	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libcrypt-dev	1:4.4.36-4build1	libcrypt development files This package contains the files needed for developing applications that use libcrypt.
libgcc-10-dev	10.5.0-4ubuntu2.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-11-dev	11.5.0-1ubuntu1~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-12-dev	12.4.0-2ubuntu1~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-13-dev	13.3.0-6ubuntu2~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-14-dev	14.2.0-4ubuntu2~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libobjc-13-dev	13.3.0-6ubuntu2~24.04.1	Runtime library for GNU Objective-C applications (development files) This package contains the headers and static library files needed to build GNU ObjC applications.
libssl-dev	3.0.13-0ubuntu3.9	Secure Sockets Layer toolkit - development files This package is part of the OpenSSL project's implementation of the SSL and TLS cryptographic protocols for secure communication over the Internet. . It contains development libraries, header files, and manpages for libssl and libcrypto.
libstdc++-10-dev	10.5.0-4ubuntu2.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-11-dev	11.5.0-1ubuntu1~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-12-dev	12.4.0-2ubuntu1~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-13-dev	13.3.0-6ubuntu2~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-14-dev	14.2.0-4ubuntu2~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libtbb-dev	2021.11.0-2ubuntu2	parallelism library for C++ - development files TBB is a library that helps you leverage multi-core processor performance without having to be a threading expert. It represents a higher-level, task-based parallelism that abstracts platform details and threading mechanism for performance and scalability. . (Note: if you are a user of the i386 architecture, i.e., 32-bit Intel or compatible hardware, this package only supports Pentium4-compatible and higher processors.) . This package includes the TBB development files.

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Feb 19, 2026 20:06	3,116	17,879,510	2,742,000	0	2,441,216
2	Feb 19, 2026 20:06	3,138	23,410,037	2,761,000	0	2,437,120
3	Feb 19, 2026 20:06	3,145	20,862,630	2,768,000	0	2,433,024
4	Feb 19, 2026 20:06	3,156	20,722,712	2,777,000	0	2,433,024
5	Feb 19, 2026 20:06	3,156	19,028,695	2,777,000	0	2,433,024
6	Feb 19, 2026 20:06	3,164	23,162,951	2,784,000	0	2,437,120
7	Feb 19, 2026 20:13	3,170	20,388,051	2,790,000	0	2,433,024
8	Feb 19, 2026 20:09	3,170	21,428,384	2,790,000	0	2,424,832
9	Feb 19, 2026 20:07	3,173	22,232,388	2,792,000	0	2,433,024
10	Feb 19, 2026 20:06	3,181	19,805,320	2,799,000	0	2,519,040
11	Feb 19, 2026 20:09	3,181	23,318,183	2,799,000	0	2,437,120
12	Feb 19, 2026 20:09	3,186	16,847,297	2,804,000	0	2,437,120
13	Feb 19, 2026 20:06	3,190	17,805,698	2,807,000	0	2,445,312
14	Feb 19, 2026 20:06	3,191	21,060,985	2,808,000	0	2,433,024
15	Feb 19, 2026 20:07	3,195	19,393,111	2,812,000	0	2,433,024
16	Feb 19, 2026 20:12	3,269	19,161,979	1,918,000	959,000	2,531,328
17	Feb 19, 2026 20:06	3,273	17,852,412	960,000	1,920,000	2,424,832
18	Feb 19, 2026 20:06	3,320	22,177,261	1,948,000	974,000	2,437,120
19	Feb 20, 2026 00:43	3,320	18,825,466	974,000	1,948,000	2,437,120
20	Feb 19, 2026 20:06	3,324	20,742,187	1,950,000	975,000	2,437,120
21	Feb 20, 2026 00:43	3,325	16,093,309	1,951,000	975,000	2,531,328
22	Feb 19, 2026 20:13	3,325	22,668,432	1,951,000	975,000	2,437,120
23	Feb 20, 2026 00:43	3,327	18,009,032	2,928,000	0	2,433,024
24	Feb 20, 2026 00:42	3,327	19,530,697	2,928,000	0	2,428,928
25	Feb 19, 2026 20:06	3,338	22,011,185	1,958,000	979,000	2,510,848
26	Feb 19, 2026 20:06	3,344	20,809,773	1,962,000	981,000	2,441,216
27	Feb 19, 2026 20:06	3,359	17,812,155	2,956,000	0	2,437,120
28	Feb 19, 2026 20:12	3,361	18,309,461	1,972,000	986,000	2,420,736
29	Feb 19, 2026 20:06	3,440	23,301,542	2,018,000	1,009,000	2,433,024
30	Feb 19, 2026 20:12	3,552	21,032,287	2,084,000	1,042,000	2,433,024
31	Feb 19, 2026 20:13	3,685	22,961,927	2,162,000	1,081,000	2,424,832
32	Feb 19, 2026 20:06	3,719	19,337,048	2,182,000	1,091,000	2,531,328
33	Feb 19, 2026 20:06	3,780	19,452,893	3,326,000	0	2,437,120
34	Feb 19, 2026 20:07	3,802	18,849,428	3,346,000	0	2,433,024
35	Feb 20, 2026 00:42	3,866	21,198,613	3,402,000	0	2,428,928
36	Feb 20, 2026 00:42	3,895	21,316,333	3,428,000	0	2,437,120

Model	Intel(R) Xeon(R) CPU E3-1271 v3 @ 3.60GHz
Cores	1