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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Source Code

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Challenge History

Date	Challenger	Cost	Type	Status
Apr 24, 2026 13:01	Victor Mercklé	10.00	Custom	Solution Broken
Apr 23, 2026 18:51	Victor Mercklé	10.00	Custom	Solution Held

Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory	Error
1	Apr 24, 2026 13:02	0	20,431,628	0	1,214,000	339,968	No answer to stdout. Died or killed?
2	Mar 9, 2026 00:22	2,934	20,879,937	2,582,000	0	2,531,328
3	Mar 9, 2026 00:19	2,938	17,372,641	2,585,000	0	2,441,216
4	Mar 9, 2026 00:19	2,944	22,139,386	2,591,000	0	2,449,408
5	Mar 9, 2026 00:19	2,947	13,963,310	2,593,000	0	2,441,216
6	Mar 9, 2026 00:22	2,951	15,764,533	2,597,000	0	2,441,216
7	Mar 9, 2026 00:19	2,960	18,273,205	2,605,000	0	2,441,216
8	Mar 9, 2026 00:22	2,966	20,028,226	2,610,000	0	2,445,312
9	Mar 9, 2026 00:22	2,973	21,193,281	2,616,000	0	2,445,312
10	Mar 9, 2026 00:19	2,973	18,282,097	2,616,000	0	2,531,328
11	Mar 9, 2026 00:22	2,977	20,902,150	2,620,000	0	2,441,216
12	Mar 9, 2026 00:19	2,981	18,028,963	2,623,000	0	2,445,312
13	Mar 9, 2026 00:19	2,982	16,951,730	2,624,000	0	2,441,216
14	Mar 9, 2026 00:19	2,983	19,646,291	2,625,000	0	2,445,312
15	Mar 9, 2026 00:19	2,984	14,775,459	2,626,000	0	2,441,216
16	Mar 9, 2026 00:21	2,984	16,380,996	2,626,000	0	2,437,120
17	Mar 9, 2026 00:21	2,986	20,827,514	2,628,000	0	2,441,216
18	Mar 9, 2026 00:22	2,988	23,124,745	2,629,000	0	2,445,312
19	Mar 9, 2026 00:21	2,988	17,001,431	2,629,000	0	2,441,216
20	Mar 9, 2026 00:22	2,991	16,834,628	2,632,000	0	2,449,408
21	Mar 9, 2026 00:20	2,992	18,062,448	2,633,000	0	2,441,216
22	Mar 9, 2026 00:22	3,001	20,656,593	2,641,000	0	2,531,328
23	Mar 9, 2026 00:20	3,007	20,819,808	2,646,000	0	2,445,312
24	Mar 9, 2026 00:22	3,042	18,672,328	2,677,000	0	2,437,120
25	Mar 9, 2026 00:22	3,043	23,262,420	2,678,000	0	2,531,328
26	Mar 9, 2026 00:19	3,099	23,393,505	2,727,000	0	2,449,408
27	Mar 9, 2026 00:20	3,108	19,842,807	2,735,000	0	2,441,216
28	Mar 9, 2026 00:19	3,116	19,726,461	2,742,000	0	2,437,120
29	Mar 9, 2026 00:19	3,117	24,202,743	2,743,000	0	2,531,328
30	Mar 9, 2026 00:19	3,120	22,188,971	2,746,000	0	2,445,312
31	Mar 9, 2026 00:20	3,134	16,326,936	1,379,000	1,379,000	2,441,216
32	Mar 9, 2026 00:19	3,136	24,534,522	2,760,000	0	2,445,312
33	Mar 9, 2026 00:19	3,142	19,472,315	2,765,000	0	2,449,408
34	Mar 9, 2026 00:21	3,434	17,709,784	2,015,000	1,007,000	2,445,312
35	Mar 9, 2026 00:20	3,436	19,807,477	2,016,000	1,008,000	2,433,024
36	Mar 9, 2026 00:21	3,455	16,456,551	2,027,000	1,013,000	2,449,408
37	Mar 9, 2026 00:20	3,492	25,419,985	2,049,000	1,024,000	2,441,216
38	Mar 9, 2026 00:22	3,540	21,552,105	2,077,000	1,038,000	2,441,216
39	Mar 9, 2026 00:21	3,609	19,126,191	3,176,000	0	2,441,216
40	Mar 9, 2026 00:22	3,753	19,677,946	2,202,000	1,101,000	2,433,024

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