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 20, 2026 12:58	3,107	18,740,068	2,734,000	0	2,437,120
2	Feb 22, 2026 03:05	3,110	21,277,533	2,737,000	0	2,437,120
3	Feb 20, 2026 12:58	3,114	19,985,333	2,740,000	0	2,433,024
4	Feb 20, 2026 12:55	3,120	17,968,060	2,746,000	0	2,433,024
5	Feb 22, 2026 03:06	3,125	17,066,710	2,750,000	0	2,424,832
6	Feb 20, 2026 12:58	3,130	18,007,362	2,754,000	0	2,433,024
7	Feb 22, 2026 03:03	3,134	22,240,934	2,758,000	0	2,433,024
8	Feb 20, 2026 12:55	3,136	18,434,937	2,760,000	0	2,437,120
9	Feb 22, 2026 03:03	3,136	19,242,790	2,760,000	0	2,441,216
10	Feb 22, 2026 03:03	3,142	18,605,035	2,765,000	0	2,437,120
11	Feb 20, 2026 12:58	3,143	14,597,236	2,766,000	0	2,437,120
12	Feb 20, 2026 12:57	3,147	19,145,996	2,769,000	0	2,433,024
13	Feb 20, 2026 12:57	3,152	23,311,197	2,774,000	0	2,433,024
14	Feb 20, 2026 12:55	3,153	20,024,365	2,775,000	0	2,437,120
15	Feb 20, 2026 12:56	3,153	18,282,915	2,775,000	0	2,433,024
16	Feb 20, 2026 12:55	3,156	20,928,966	2,777,000	0	2,433,024
17	Feb 22, 2026 03:06	3,161	20,112,042	2,782,000	0	2,277,376
18	Feb 20, 2026 12:57	3,164	20,073,092	2,784,000	0	2,441,216
19	Feb 20, 2026 12:55	3,166	18,035,867	2,786,000	0	2,428,928
20	Feb 22, 2026 03:05	3,307	19,337,669	2,910,000	0	2,535,424
21	Feb 20, 2026 12:55	3,307	16,886,007	1,940,000	970,000	2,437,120
22	Feb 20, 2026 12:58	3,311	21,222,582	1,943,000	971,000	2,437,120
23	Feb 20, 2026 12:58	3,313	16,532,777	2,915,000	0	2,428,928
24	Feb 20, 2026 12:54	3,315	22,700,381	2,917,000	0	2,433,024
25	Feb 20, 2026 12:55	3,318	16,985,435	1,947,000	973,000	2,433,024
26	Feb 22, 2026 03:03	3,320	17,104,920	1,948,000	974,000	2,437,120
27	Feb 22, 2026 03:06	3,320	20,460,564	2,922,000	0	2,437,120
28	Feb 20, 2026 12:54	3,320	20,264,810	1,948,000	974,000	2,437,120
29	Feb 20, 2026 12:56	3,322	20,884,992	1,949,000	974,000	2,523,136
30	Feb 22, 2026 03:06	3,324	17,541,987	1,950,000	975,000	2,437,120
31	Feb 20, 2026 12:55	3,324	22,216,168	975,000	1,950,000	2,428,928
32	Feb 20, 2026 12:58	3,325	18,551,816	1,951,000	975,000	2,445,312
33	Feb 20, 2026 12:55	3,325	22,382,505	1,951,000	975,000	2,428,928
34	Feb 20, 2026 12:58	3,328	16,085,396	1,953,000	976,000	2,437,120
35	Feb 22, 2026 03:05	3,348	20,392,924	1,964,000	982,000	2,277,376
36	Feb 22, 2026 03:03	3,410	19,182,777	2,001,000	1,000,000	2,437,120
37	Feb 22, 2026 03:06	3,455	21,815,011	2,027,000	1,013,000	2,277,376
38	Feb 22, 2026 03:03	3,601	16,138,300	2,113,000	1,056,000	2,428,928
39	Feb 22, 2026 03:06	3,725	19,439,174	3,278,000	0	2,437,120
40	Feb 20, 2026 12:55	3,745	21,676,744	3,296,000	0	2,535,424
41	Feb 20, 2026 12:55	3,747	22,503,017	2,198,000	1,099,000	2,424,832
42	Feb 20, 2026 12:56	3,749	20,387,625	3,299,000	0	2,428,928
43	Feb 20, 2026 12:54	3,770	18,893,762	3,318,000	0	2,428,928
44	Feb 20, 2026 12:58	3,817	21,497,703	3,359,000	0	2,281,472
45	Feb 20, 2026 12:55	3,820	18,807,114	3,362,000	0	2,433,024

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