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 16:19	3,413	19,213,026	1,001,000	2,002,000	2,285,568
2	Feb 5, 2026 16:18	3,448	19,974,571	1,011,000	2,023,000	2,281,472
3	Feb 5, 2026 16:22	3,453	21,410,463	1,013,000	2,026,000	2,494,464
4	Feb 5, 2026 16:22	3,455	23,720,269	1,013,000	2,027,000	2,502,656
5	Feb 5, 2026 16:22	3,455	17,235,425	1,013,000	2,027,000	2,535,424
6	Feb 5, 2026 16:21	3,468	21,433,643	1,017,000	2,035,000	2,494,464
7	Feb 5, 2026 16:22	3,470	16,381,743	1,018,000	2,036,000	2,281,472
8	Feb 5, 2026 16:22	3,470	15,210,134	1,018,000	2,036,000	2,502,656
9	Feb 5, 2026 16:19	3,475	20,729,444	1,019,000	2,039,000	2,494,464
10	Feb 5, 2026 16:14	3,477	20,029,053	1,020,000	2,040,000	2,498,560
11	Feb 5, 2026 16:15	3,478	16,304,238	1,020,000	2,041,000	2,494,464
12	Feb 5, 2026 16:18	3,478	21,902,963	1,020,000	2,041,000	2,490,368
13	Feb 5, 2026 16:22	3,481	18,340,705	1,021,000	2,042,000	2,502,656
14	Feb 5, 2026 16:10	3,481	17,482,601	1,021,000	2,042,000	2,498,560
15	Feb 5, 2026 16:19	3,484	20,650,316	1,022,000	2,044,000	2,494,464
16	Feb 5, 2026 16:09	3,492	17,779,791	1,024,000	2,049,000	2,494,464
17	Feb 5, 2026 16:14	3,501	18,259,492	1,027,000	2,054,000	2,494,464
18	Feb 5, 2026 16:09	3,508	17,639,161	1,029,000	2,058,000	2,498,560
19	Feb 5, 2026 16:13	3,511	21,886,989	1,030,000	2,060,000	2,490,368
20	Feb 5, 2026 16:22	3,518	19,760,069	1,032,000	2,064,000	2,494,464
21	Feb 5, 2026 16:21	3,519	19,413,194	1,032,000	2,065,000	2,494,464
22	Feb 5, 2026 16:21	3,523	20,686,169	1,033,000	2,067,000	2,494,464
23	Feb 5, 2026 16:21	3,532	22,656,675	1,036,000	2,072,000	2,490,368
24	Feb 5, 2026 16:18	3,536	19,073,119	1,037,000	2,075,000	2,494,464
25	Feb 5, 2026 16:13	3,540	23,809,817	1,038,000	2,077,000	2,494,464
26	Feb 5, 2026 16:22	3,540	17,101,887	1,038,000	2,077,000	2,277,376
27	Feb 5, 2026 16:15	3,542	19,209,006	1,039,000	2,078,000	2,482,176
28	Feb 5, 2026 16:19	3,545	20,773,562	1,040,000	2,080,000	2,494,464
29	Feb 5, 2026 16:09	3,545	19,225,811	1,040,000	2,080,000	2,486,272
30	Feb 5, 2026 16:15	3,549	17,385,415	1,041,000	2,082,000	2,281,472
31	Feb 5, 2026 16:21	3,556	18,603,055	1,043,000	2,086,000	2,277,376
32	Feb 5, 2026 16:19	3,566	17,029,975	1,046,000	2,092,000	2,281,472
33	Feb 5, 2026 16:21	3,570	16,739,493	1,047,000	2,095,000	2,498,560
34	Feb 5, 2026 16:19	3,580	21,731,532	1,050,000	2,100,000	2,502,656
35	Feb 5, 2026 16:22	3,583	25,052,550	1,051,000	2,102,000	2,494,464
36	Feb 5, 2026 16:10	3,591	19,777,003	1,053,000	2,107,000	2,502,656
37	Feb 5, 2026 16:10	3,627	19,254,999	1,064,000	2,128,000	2,498,560
38	Feb 5, 2026 16:13	3,651	17,938,178	1,071,000	2,142,000	2,506,752
39	Feb 5, 2026 16:14	3,658	18,576,575	1,073,000	2,146,000	2,494,464

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