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.
Source Code
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Challenge History
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Run Statistics
| # | Date | Score | Wall Time | CPU User | CPU System | Memory | Error | |
|---|---|---|---|---|---|---|---|---|
| 1 | Mar 22, 2026 15:17 | 11,602 | 30,307,110 | 8,168,000 | 2,042,000 | 2,506,752 | ||
| 2 | Mar 22, 2026 15:22 | 11,689 | 27,786,366 | 10,286,000 | 0 | 2,445,312 | ||
| 3 | Mar 22, 2026 15:20 | 11,691 | 34,333,956 | 9,260,000 | 1,028,000 | 2,355,200 | ||
| 4 | Mar 22, 2026 15:17 | 11,694 | 29,833,569 | 9,262,000 | 1,029,000 | 2,359,296 | ||
| 5 | Mar 22, 2026 15:20 | 11,706 | 29,561,201 | 9,271,000 | 1,030,000 | 2,445,312 | ||
| 6 | Mar 22, 2026 15:21 | 11,707 | 27,494,595 | 9,272,000 | 1,030,000 | 2,506,752 | ||
| 7 | Mar 22, 2026 15:21 | 11,713 | 26,187,876 | 9,277,000 | 1,030,000 | 2,437,120 | ||
| 8 | Mar 22, 2026 15:21 | 11,717 | 31,395,032 | 10,311,000 | 0 | 2,351,104 | ||
| 9 | Mar 22, 2026 15:19 | 11,717 | 25,728,083 | 9,280,000 | 1,031,000 | 2,437,120 | ||
| 10 | Mar 22, 2026 15:20 | 11,722 | 25,972,473 | 8,252,000 | 2,063,000 | 2,461,696 | ||
| 11 | Mar 22, 2026 15:20 | 11,733 | 22,889,576 | 9,293,000 | 1,032,000 | 2,445,312 | ||
| 12 | Mar 22, 2026 15:20 | 11,738 | 29,691,511 | 10,329,000 | 0 | 2,441,216 | ||
| 13 | Mar 22, 2026 15:17 | 11,743 | 31,850,638 | 9,301,000 | 1,033,000 | 2,506,752 | ||
| 14 | Mar 22, 2026 15:20 | 11,743 | 28,452,067 | 9,301,000 | 1,033,000 | 2,506,752 | ||
| 15 | Mar 22, 2026 15:20 | 11,743 | 31,669,010 | 9,301,000 | 1,033,000 | 2,281,472 | ||
| 16 | Mar 22, 2026 15:20 | 11,749 | 29,902,688 | 10,339,000 | 0 | 2,457,600 | ||
| 17 | Mar 22, 2026 15:20 | 11,757 | 21,830,896 | 9,312,000 | 1,034,000 | 2,441,216 | ||
| 18 | Mar 22, 2026 15:21 | 11,758 | 28,713,300 | 9,313,000 | 1,034,000 | 2,351,104 | ||
| 19 | Mar 22, 2026 15:20 | 11,763 | 32,817,924 | 10,351,000 | 0 | 2,347,008 | ||
| 20 | Mar 22, 2026 15:22 | 11,766 | 34,383,208 | 9,319,000 | 1,035,000 | 2,506,752 | ||
| 21 | Mar 22, 2026 15:20 | 11,768 | 26,965,262 | 9,321,000 | 1,035,000 | 2,502,656 | ||
| 22 | Mar 22, 2026 15:20 | 11,768 | 23,654,654 | 10,356,000 | 0 | 2,498,560 | ||
| 23 | Mar 22, 2026 15:22 | 11,775 | 28,151,572 | 10,362,000 | 0 | 2,498,560 | ||
| 24 | Mar 22, 2026 15:17 | 11,781 | 31,672,227 | 10,367,000 | 0 | 2,347,008 | ||
| 25 | Mar 22, 2026 15:18 | 11,783 | 29,554,055 | 10,369,000 | 0 | 2,424,832 | ||
| 26 | Mar 22, 2026 15:21 | 11,786 | 31,444,063 | 10,372,000 | 0 | 2,502,656 | ||
| 27 | Mar 22, 2026 15:18 | 11,788 | 28,897,796 | 9,336,000 | 1,037,000 | 2,433,024 | ||
| 28 | Mar 22, 2026 15:17 | 11,793 | 31,243,685 | 8,303,000 | 2,075,000 | 2,441,216 | ||
| 29 | Mar 22, 2026 15:20 | 11,806 | 28,771,115 | 10,389,000 | 0 | 2,494,464 | ||
| 30 | Mar 22, 2026 15:21 | 11,809 | 26,585,222 | 9,353,000 | 1,039,000 | 2,502,656 | ||
| 31 | Mar 22, 2026 15:20 | 11,825 | 30,706,912 | 9,366,000 | 1,040,000 | 2,441,216 | ||
| 32 | Mar 22, 2026 15:21 | 11,857 | 27,572,883 | 9,391,000 | 1,043,000 | 2,351,104 | ||
| 33 | Mar 22, 2026 15:22 | 11,857 | 25,336,605 | 9,391,000 | 1,043,000 | 2,502,656 | ||
| 34 | Mar 22, 2026 15:18 | 11,863 | 26,343,047 | 10,439,000 | 0 | 2,502,656 | ||
| 35 | Mar 22, 2026 15:20 | 11,866 | 29,058,277 | 9,398,000 | 1,044,000 | 2,441,216 | ||
| 36 | Mar 22, 2026 15:22 | 11,873 | 26,008,775 | 8,359,000 | 2,089,000 | 2,260,992 | ||
| 37 | Mar 22, 2026 15:19 | 11,874 | 31,655,589 | 10,449,000 | 0 | 2,351,104 | ||
| 38 | Mar 22, 2026 15:19 | 11,890 | 37,063,825 | 10,463,000 | 0 | 2,494,464 | ||
| 39 | Mar 22, 2026 15:21 | 11,892 | 27,100,037 | 9,419,000 | 1,046,000 | 2,289,664 | ||
| 40 | Mar 22, 2026 15:20 | 11,892 | 27,864,254 | 10,465,000 | 0 | 2,297,856 | ||
| 41 | Mar 22, 2026 15:22 | 11,899 | 26,071,779 | 9,424,000 | 1,047,000 | 2,428,928 | ||
| 42 | Mar 22, 2026 15:21 | 11,900 | 30,359,799 | 8,378,000 | 2,094,000 | 2,449,408 | ||
| 43 | Mar 22, 2026 15:17 | 11,901 | 26,729,698 | 9,426,000 | 1,047,000 | 2,502,656 | ||
| 44 | Mar 22, 2026 15:20 | 11,913 | 27,361,440 | 9,435,000 | 1,048,000 | 2,428,928 | ||
| 45 | Mar 22, 2026 15:17 | 11,923 | 32,500,091 | 10,492,000 | 0 | 2,441,216 | ||
| 46 | Mar 22, 2026 15:21 | 11,930 | 31,748,317 | 9,449,000 | 1,049,000 | 2,265,088 | ||
| 47 | Mar 22, 2026 15:17 | 11,933 | 26,369,303 | 9,451,000 | 1,050,000 | 2,449,408 | ||
| 48 | Mar 22, 2026 15:17 | 11,957 | 29,230,164 | 9,470,000 | 1,052,000 | 2,424,832 | ||
| 49 | Mar 22, 2026 15:21 | 11,967 | 28,521,081 | 9,478,000 | 1,053,000 | 2,445,312 | ||
| 50 | Mar 22, 2026 15:21 | 11,969 | 25,934,612 | 9,480,000 | 1,053,000 | 2,490,368 | ||
| 51 | Mar 22, 2026 15:20 | 11,997 | 28,025,448 | 9,502,000 | 1,055,000 | 2,449,408 |