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 5, 2026 19:41	3,441	18,931,810	1,009,000	2,019,000	2,494,464
2	Feb 5, 2026 17:30	3,448	20,285,180	1,011,000	2,023,000	2,277,376
3	Feb 5, 2026 19:42	3,457	22,639,004	1,014,000	2,028,000	2,494,464
4	Feb 5, 2026 19:41	3,460	19,895,286	1,015,000	2,030,000	2,498,560
5	Feb 5, 2026 17:30	3,464	17,213,670	1,016,000	2,032,000	2,494,464
6	Feb 5, 2026 17:31	3,465	19,356,483	1,016,000	2,033,000	2,498,560
7	Feb 5, 2026 19:42	3,465	23,730,287	1,016,000	2,033,000	2,502,656
8	Feb 5, 2026 17:30	3,465	21,013,238	1,016,000	2,033,000	2,277,376
9	Feb 5, 2026 17:31	3,467	19,010,522	1,017,000	2,034,000	2,498,560
10	Feb 5, 2026 19:41	3,467	19,184,173	1,017,000	2,034,000	2,494,464
11	Feb 5, 2026 17:31	3,468	21,917,486	1,017,000	2,035,000	2,281,472
12	Feb 5, 2026 17:30	3,470	21,068,892	1,018,000	2,036,000	2,494,464
13	Feb 5, 2026 19:41	3,472	17,898,726	1,018,000	2,037,000	2,281,472
14	Feb 5, 2026 19:41	3,472	19,513,903	1,018,000	2,037,000	2,490,368
15	Feb 5, 2026 19:41	3,477	20,297,508	1,020,000	2,040,000	2,494,464
16	Feb 5, 2026 19:41	3,478	26,021,525	1,020,000	2,041,000	2,494,464
17	Feb 5, 2026 17:30	3,481	23,499,847	1,021,000	2,042,000	2,498,560
18	Feb 5, 2026 17:31	3,481	24,032,757	1,021,000	2,042,000	2,486,272
19	Feb 5, 2026 19:42	3,481	18,875,370	1,021,000	2,042,000	2,494,464
20	Feb 5, 2026 19:42	3,481	18,199,239	1,021,000	2,042,000	2,490,368
21	Feb 5, 2026 19:41	3,484	26,740,336	1,022,000	2,044,000	2,498,560
22	Feb 5, 2026 19:41	3,484	21,563,746	1,022,000	2,044,000	2,498,560
23	Feb 5, 2026 17:31	3,484	16,375,310	1,022,000	2,044,000	2,277,376
24	Feb 5, 2026 17:30	3,485	18,326,487	1,022,000	2,045,000	2,277,376
25	Feb 5, 2026 17:30	3,488	17,135,213	1,023,000	2,046,000	2,502,656
26	Feb 5, 2026 19:42	3,495	22,893,286	1,025,000	2,051,000	2,277,376
27	Feb 5, 2026 17:31	3,501	20,400,692	1,027,000	2,054,000	2,490,368
28	Feb 5, 2026 17:31	3,501	21,393,291	1,027,000	2,054,000	2,490,368
29	Feb 5, 2026 17:30	3,505	21,435,927	1,028,000	2,056,000	2,498,560
30	Feb 5, 2026 19:42	3,506	21,401,895	1,028,000	2,057,000	2,281,472
31	Feb 5, 2026 17:31	3,513	19,774,946	1,030,000	2,061,000	2,277,376
32	Feb 5, 2026 17:30	3,513	23,780,437	1,030,000	2,061,000	2,277,376
33	Feb 5, 2026 17:31	3,522	26,446,840	1,033,000	2,066,000	2,494,464
34	Feb 5, 2026 19:42	3,523	20,808,627	1,033,000	2,067,000	2,486,272
35	Feb 5, 2026 19:42	3,528	20,185,994	1,035,000	2,070,000	2,502,656
36	Feb 5, 2026 19:42	3,678	19,482,094	1,079,000	2,158,000	2,535,424

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