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 13:03	Victor Mercklé	10.00	Custom	Solution Broken

Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory	Error
1	Apr 24, 2026 13:03	0	18,698,848	1,338,000	1,338,000	2,506,752	expected "11061630420209 ", got "341521 "
2	Apr 24, 2026 13:03	0	18,783,761	1,323,000	1,323,000	2,498,560	expected "10939168110713 ", got "4023897 "
3	Apr 24, 2026 13:03	0	17,733,880	1,352,000	1,352,000	2,502,656	expected "11059328164440 ", got "1001369 "
4	Feb 7, 2026 19:27	3,235	29,583,425	2,847,000	0	2,506,752
5	Feb 7, 2026 19:36	3,238	22,456,058	2,849,000	0	2,273,280
6	Feb 7, 2026 19:36	3,256	22,444,333	2,865,000	0	2,273,280
7	Feb 7, 2026 19:26	3,259	18,200,174	2,868,000	0	2,273,280
8	Feb 7, 2026 19:27	3,265	25,404,666	2,873,000	0	2,510,848
9	Feb 7, 2026 19:36	3,281	17,003,670	2,887,000	0	2,273,280
10	Feb 7, 2026 19:26	3,284	20,665,500	1,445,000	1,445,000	2,273,280
11	Feb 7, 2026 19:27	3,284	21,388,911	2,890,000	0	2,506,752
12	Feb 7, 2026 19:26	3,285	21,324,859	2,891,000	0	2,269,184
13	Feb 7, 2026 19:32	3,286	25,131,469	2,892,000	0	2,277,376
14	Feb 7, 2026 19:36	3,288	22,243,150	2,893,000	0	2,273,280
15	Feb 7, 2026 19:32	3,289	25,360,731	2,894,000	0	2,502,656
16	Feb 7, 2026 19:27	3,293	29,621,933	2,898,000	0	2,273,280
17	Feb 7, 2026 19:36	3,293	23,517,927	2,898,000	0	2,506,752
18	Feb 7, 2026 19:32	3,297	22,800,318	2,901,000	0	2,269,184
19	Feb 7, 2026 19:27	3,299	18,491,846	2,903,000	0	2,277,376
20	Feb 7, 2026 19:32	3,301	20,741,922	2,905,000	0	2,269,184
21	Feb 7, 2026 19:32	3,301	18,396,017	2,905,000	0	2,273,280
22	Feb 7, 2026 19:26	3,303	18,868,640	2,907,000	0	2,277,376
23	Feb 7, 2026 19:32	3,305	17,268,326	2,908,000	0	2,277,376
24	Feb 7, 2026 19:36	3,307	25,286,438	2,910,000	0	2,277,376
25	Feb 7, 2026 19:32	3,307	22,164,270	2,910,000	0	2,277,376
26	Feb 7, 2026 19:36	3,309	20,558,725	2,912,000	0	2,273,280
27	Feb 7, 2026 19:32	3,313	21,557,147	2,915,000	0	2,269,184
28	Feb 7, 2026 19:26	3,314	18,028,522	2,916,000	0	2,273,280
29	Feb 7, 2026 19:26	3,316	21,183,456	2,918,000	0	2,277,376
30	Feb 7, 2026 19:26	3,320	18,251,369	2,922,000	0	2,273,280
31	Feb 7, 2026 19:27	3,324	19,258,898	2,925,000	0	2,273,280
32	Feb 7, 2026 19:36	3,331	20,080,371	2,931,000	0	2,506,752
33	Feb 7, 2026 19:27	3,339	23,695,018	2,938,000	0	2,273,280
34	Feb 7, 2026 19:27	3,349	19,912,462	2,947,000	0	2,281,472
35	Feb 7, 2026 19:32	3,368	19,904,515	2,964,000	0	2,273,280
36	Feb 7, 2026 19:27	3,397	19,918,670	2,989,000	0	2,510,848
37	Feb 7, 2026 19:26	3,426	18,407,604	3,015,000	0	2,277,376
38	Feb 7, 2026 19:26	3,459	19,459,181	3,044,000	0	2,265,088
39	Feb 7, 2026 19:36	3,481	17,812,456	3,063,000	0	2,273,280

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