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 | Jan 18, 2026 03:47 | 16,448 | 35,065,980 | 14,474,000 | 0 | 2,523,136 | ||
| 2 | Jan 18, 2026 03:49 | 16,459 | 40,798,518 | 13,450,000 | 1,034,000 | 2,514,944 | ||
| 3 | Jan 18, 2026 03:48 | 16,466 | 31,206,491 | 12,420,000 | 2,070,000 | 2,281,472 | ||
| 4 | Jan 18, 2026 03:48 | 16,468 | 32,861,586 | 14,492,000 | 0 | 2,510,848 | ||
| 5 | Jan 18, 2026 03:50 | 16,470 | 34,388,983 | 14,494,000 | 0 | 2,523,136 | ||
| 6 | Jan 18, 2026 03:48 | 16,472 | 30,122,996 | 13,460,000 | 1,035,000 | 2,514,944 | ||
| 7 | Jan 18, 2026 03:49 | 16,482 | 27,585,805 | 13,468,000 | 1,036,000 | 2,465,792 | ||
| 8 | Jan 18, 2026 03:50 | 16,483 | 27,794,214 | 13,469,000 | 1,036,000 | 2,514,944 | ||
| 9 | Jan 18, 2026 03:50 | 16,498 | 31,021,094 | 14,518,000 | 0 | 2,510,848 | ||
| 10 | Jan 18, 2026 03:48 | 16,498 | 30,816,598 | 13,481,000 | 1,037,000 | 2,514,944 | ||
| 11 | Jan 18, 2026 03:48 | 16,515 | 37,407,605 | 13,495,000 | 1,038,000 | 2,510,848 | ||
| 12 | Jan 18, 2026 03:47 | 16,519 | 32,701,865 | 13,499,000 | 1,038,000 | 2,506,752 | ||
| 13 | Jan 18, 2026 03:49 | 16,520 | 28,900,733 | 14,538,000 | 0 | 2,510,848 | ||
| 14 | Jan 18, 2026 03:48 | 16,522 | 34,074,115 | 13,501,000 | 1,038,000 | 2,514,944 | ||
| 15 | Jan 18, 2026 03:47 | 16,523 | 31,797,122 | 13,502,000 | 1,038,000 | 2,465,792 | ||
| 16 | Jan 18, 2026 03:47 | 16,524 | 30,986,796 | 14,541,000 | 0 | 2,514,944 | ||
| 17 | Jan 18, 2026 03:49 | 16,530 | 31,494,774 | 14,546,000 | 0 | 2,510,848 | ||
| 18 | Jan 18, 2026 03:49 | 16,532 | 30,258,728 | 13,509,000 | 1,039,000 | 2,514,944 | ||
| 19 | Jan 18, 2026 03:47 | 16,540 | 28,779,946 | 13,516,000 | 1,039,000 | 2,510,848 | ||
| 20 | Jan 18, 2026 03:49 | 16,543 | 28,548,571 | 12,479,000 | 2,079,000 | 2,514,944 | ||
| 21 | Jan 18, 2026 03:47 | 16,556 | 29,993,126 | 13,529,000 | 1,040,000 | 2,506,752 | ||
| 22 | Jan 18, 2026 03:48 | 16,566 | 30,552,825 | 13,537,000 | 1,041,000 | 2,510,848 | ||
| 23 | Jan 18, 2026 03:50 | 16,570 | 33,463,290 | 13,541,000 | 1,041,000 | 2,465,792 | ||
| 24 | Jan 18, 2026 03:50 | 16,581 | 41,316,105 | 13,549,000 | 1,042,000 | 2,461,696 | ||
| 25 | Jan 18, 2026 03:47 | 16,593 | 29,759,186 | 13,559,000 | 1,043,000 | 2,510,848 | ||
| 26 | Jan 18, 2026 03:47 | 16,594 | 35,015,718 | 12,517,000 | 2,086,000 | 2,514,944 | ||
| 27 | Jan 18, 2026 03:47 | 16,597 | 33,926,473 | 13,562,000 | 1,043,000 | 2,510,848 | ||
| 28 | Jan 18, 2026 03:46 | 16,599 | 33,645,656 | 14,607,000 | 0 | 2,510,848 | ||
| 29 | Jan 18, 2026 03:45 | 16,609 | 33,751,829 | 14,616,000 | 0 | 2,506,752 | ||
| 30 | Jan 18, 2026 03:45 | 16,611 | 31,533,896 | 14,618,000 | 0 | 2,514,944 | ||
| 31 | Jan 18, 2026 03:47 | 16,613 | 30,589,490 | 14,619,000 | 0 | 2,514,944 | ||
| 32 | Jan 18, 2026 03:47 | 16,614 | 35,704,231 | 13,576,000 | 1,044,000 | 2,510,848 | ||
| 33 | Jan 18, 2026 03:46 | 16,615 | 30,490,638 | 13,577,000 | 1,044,000 | 2,514,944 | ||
| 34 | Jan 18, 2026 03:46 | 16,616 | 33,877,353 | 14,622,000 | 0 | 2,408,448 | ||
| 35 | Jan 18, 2026 03:49 | 16,616 | 38,478,859 | 13,578,000 | 1,044,000 | 2,514,944 | ||
| 36 | Jan 18, 2026 03:50 | 16,619 | 36,914,399 | 14,625,000 | 0 | 2,514,944 | ||
| 37 | Jan 18, 2026 03:45 | 16,620 | 35,716,165 | 14,626,000 | 0 | 2,510,848 | ||
| 38 | Jan 18, 2026 03:46 | 16,624 | 32,838,554 | 13,585,000 | 1,044,000 | 2,351,104 | ||
| 39 | Jan 18, 2026 03:46 | 16,624 | 43,175,598 | 14,629,000 | 0 | 2,514,944 | ||
| 40 | Jan 18, 2026 03:46 | 16,626 | 34,441,142 | 13,586,000 | 1,045,000 | 2,461,696 | ||
| 41 | Jan 18, 2026 03:49 | 16,627 | 35,301,207 | 13,587,000 | 1,045,000 | 2,510,848 | ||
| 42 | Jan 18, 2026 03:46 | 16,631 | 38,666,506 | 13,590,000 | 1,045,000 | 2,523,136 | ||
| 43 | Jan 18, 2026 03:46 | 16,631 | 36,976,995 | 13,590,000 | 1,045,000 | 2,514,944 | ||
| 44 | Jan 18, 2026 03:50 | 16,635 | 31,864,007 | 13,594,000 | 1,045,000 | 2,514,944 | ||
| 45 | Jan 18, 2026 03:47 | 16,639 | 35,420,961 | 13,597,000 | 1,045,000 | 2,514,944 | ||
| 46 | Jan 18, 2026 03:49 | 16,641 | 38,824,044 | 13,598,000 | 1,046,000 | 2,404,352 | ||
| 47 | Jan 18, 2026 03:49 | 16,642 | 31,008,675 | 13,599,000 | 1,046,000 | 2,334,720 | ||
| 48 | Jan 18, 2026 03:46 | 16,643 | 31,489,746 | 13,600,000 | 1,046,000 | 2,510,848 | ||
| 49 | Jan 18, 2026 03:45 | 16,643 | 34,910,115 | 13,600,000 | 1,046,000 | 2,510,848 | ||
| 50 | Jan 18, 2026 03:46 | 16,644 | 27,725,563 | 13,601,000 | 1,046,000 | 2,514,944 | ||
| 51 | Jan 18, 2026 03:49 | 16,647 | 37,204,022 | 13,603,000 | 1,046,000 | 2,510,848 | ||
| 52 | Jan 18, 2026 03:45 | 16,653 | 29,627,129 | 13,609,000 | 1,046,000 | 2,514,944 | ||
| 53 | Jan 18, 2026 03:45 | 16,657 | 29,987,393 | 13,611,000 | 1,047,000 | 2,461,696 | ||
| 54 | Jan 18, 2026 03:46 | 16,659 | 33,179,779 | 13,613,000 | 1,047,000 | 2,465,792 | ||
| 55 | Jan 18, 2026 03:45 | 16,659 | 34,160,295 | 13,613,000 | 1,047,000 | 2,506,752 | ||
| 56 | Jan 18, 2026 03:48 | 16,664 | 30,650,547 | 14,664,000 | 0 | 2,281,472 | ||
| 57 | Jan 18, 2026 03:48 | 16,666 | 34,884,769 | 13,619,000 | 1,047,000 | 2,514,944 | ||
| 58 | Jan 18, 2026 03:47 | 16,673 | 38,846,706 | 13,624,000 | 1,048,000 | 2,510,848 | ||
| 59 | Jan 18, 2026 03:46 | 16,677 | 43,347,246 | 12,580,000 | 2,096,000 | 2,510,848 | ||
| 60 | Jan 18, 2026 03:48 | 16,680 | 30,436,768 | 14,678,000 | 0 | 2,510,848 | ||
| 61 | Jan 18, 2026 03:50 | 16,682 | 46,599,814 | 13,632,000 | 1,048,000 | 2,506,752 | ||
| 62 | Jan 18, 2026 03:50 | 16,686 | 28,961,499 | 14,684,000 | 0 | 2,510,848 | ||
| 63 | Jan 18, 2026 03:47 | 16,689 | 42,695,866 | 13,637,000 | 1,049,000 | 2,347,008 | ||
| 64 | Jan 18, 2026 03:49 | 16,691 | 29,660,026 | 13,639,000 | 1,049,000 | 2,461,696 | ||
| 65 | Jan 18, 2026 03:50 | 16,692 | 29,473,618 | 13,640,000 | 1,049,000 | 2,510,848 | ||
| 66 | Jan 18, 2026 03:45 | 16,705 | 42,777,343 | 13,650,000 | 1,050,000 | 2,457,600 | ||
| 67 | Jan 18, 2026 03:45 | 16,706 | 28,834,217 | 13,651,000 | 1,050,000 | 2,514,944 | ||
| 68 | Jan 18, 2026 03:49 | 16,709 | 29,477,179 | 13,654,000 | 1,050,000 | 2,510,848 | ||
| 69 | Jan 18, 2026 03:49 | 16,710 | 30,082,863 | 13,655,000 | 1,050,000 | 2,502,656 | ||
| 70 | Jan 18, 2026 03:47 | 16,724 | 37,961,130 | 13,666,000 | 1,051,000 | 2,514,944 | ||
| 71 | Jan 18, 2026 03:47 | 16,733 | 39,104,461 | 13,674,000 | 1,051,000 | 2,510,848 | ||
| 72 | Jan 18, 2026 03:47 | 16,733 | 33,953,601 | 13,674,000 | 1,051,000 | 2,514,944 | ||
| 73 | Jan 18, 2026 03:46 | 16,734 | 39,733,807 | 13,675,000 | 1,051,000 | 2,514,944 | ||
| 74 | Jan 18, 2026 03:50 | 16,735 | 28,888,701 | 14,727,000 | 0 | 2,510,848 | ||
| 75 | Jan 18, 2026 03:50 | 16,738 | 45,765,658 | 13,677,000 | 1,052,000 | 2,510,848 | ||
| 76 | Jan 18, 2026 03:47 | 16,741 | 39,439,510 | 13,680,000 | 1,052,000 | 2,514,944 | ||
| 77 | Jan 18, 2026 03:48 | 16,780 | 35,589,888 | 12,657,000 | 2,109,000 | 2,461,696 | ||
| 78 | Jan 18, 2026 03:46 | 16,791 | 41,959,508 | 14,776,000 | 0 | 2,514,944 | ||
| 79 | Jan 18, 2026 03:49 | 16,932 | 25,635,127 | 13,907,000 | 993,000 | 2,338,816 | ||
| 80 | Jan 18, 2026 03:48 | 16,940 | 46,421,850 | 11,926,000 | 2,981,000 | 2,351,104 | ||
| 81 | Jan 18, 2026 03:46 | 16,952 | 51,349,564 | 14,918,000 | 0 | 2,506,752 | ||
| 82 | Jan 18, 2026 03:46 | 18,355 | 36,946,466 | 13,124,000 | 3,028,000 | 2,351,104 | ||
| 83 | Jan 18, 2026 03:46 | 18,606 | 39,463,142 | 15,350,000 | 1,023,000 | 2,510,848 | ||
| 84 | Jan 18, 2026 03:46 | 18,644 | 44,814,674 | 16,407,000 | 0 | 2,510,848 |