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 15:33	3,102	22,689,653	2,730,000	0	2,437,120
2	Feb 20, 2026 15:36	3,113	18,115,247	2,739,000	0	2,441,216
3	Feb 20, 2026 15:33	3,116	17,068,336	2,742,000	0	2,433,024
4	Feb 20, 2026 15:36	3,122	18,732,234	2,747,000	0	2,433,024
5	Feb 20, 2026 15:34	3,123	22,136,249	2,748,000	0	2,433,024
6	Feb 20, 2026 15:33	3,144	18,153,968	2,767,000	0	2,433,024
7	Feb 20, 2026 15:33	3,148	17,007,272	2,770,000	0	2,437,120
8	Feb 20, 2026 15:36	3,148	23,533,255	2,770,000	0	2,441,216
9	Feb 20, 2026 15:34	3,151	17,567,129	2,773,000	0	2,535,424
10	Feb 20, 2026 15:33	3,155	19,883,025	2,776,000	0	2,428,928
11	Feb 20, 2026 15:33	3,156	18,779,402	2,777,000	0	2,535,424
12	Feb 20, 2026 15:36	3,163	18,324,167	2,783,000	0	2,535,424
13	Feb 20, 2026 15:35	3,164	16,351,426	2,784,000	0	2,424,832
14	Feb 20, 2026 15:37	3,165	25,378,859	2,785,000	0	2,428,928
15	Feb 20, 2026 15:35	3,169	16,319,146	2,789,000	0	2,437,120
16	Feb 20, 2026 15:34	3,203	25,048,835	2,819,000	0	2,424,832
17	Feb 20, 2026 15:37	3,298	23,197,402	1,935,000	967,000	2,437,120
18	Feb 20, 2026 15:34	3,303	21,113,841	1,938,000	969,000	2,433,024
19	Feb 20, 2026 15:34	3,308	18,158,825	1,941,000	970,000	2,428,928
20	Feb 20, 2026 15:36	3,308	16,108,531	1,941,000	970,000	2,433,024
21	Feb 20, 2026 15:33	3,311	23,831,313	1,943,000	971,000	2,433,024
22	Feb 20, 2026 15:37	3,314	21,607,565	1,944,000	972,000	2,535,424
23	Feb 20, 2026 15:33	3,315	17,186,686	1,945,000	972,000	2,424,832
24	Feb 20, 2026 15:34	3,322	22,270,175	1,949,000	974,000	2,519,040
25	Feb 20, 2026 15:37	3,325	21,316,262	1,951,000	975,000	2,433,024
26	Feb 20, 2026 15:36	3,330	18,145,991	2,930,000	0	2,437,120
27	Feb 20, 2026 15:37	3,359	27,195,487	1,971,000	985,000	2,433,024
28	Feb 20, 2026 15:36	3,389	20,539,293	1,988,000	994,000	2,437,120
29	Feb 20, 2026 15:37	3,586	18,951,991	2,104,000	1,052,000	2,424,832
30	Feb 20, 2026 15:34	3,601	19,243,613	2,113,000	1,056,000	2,433,024
31	Feb 20, 2026 15:34	3,649	23,075,886	2,141,000	1,070,000	2,437,120
32	Feb 20, 2026 15:36	3,665	17,801,187	2,150,000	1,075,000	2,433,024
33	Feb 20, 2026 15:33	3,693	19,164,314	3,250,000	0	2,277,376
34	Feb 20, 2026 15:35	3,769	18,901,343	3,317,000	0	2,433,024
35	Feb 20, 2026 15:36	3,852	17,841,296	3,390,000	0	2,420,736
36	Feb 20, 2026 15:34	3,926	17,618,908	3,455,000	0	2,428,928

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