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 7, 2026 20:43 | 3,015 | 20,033,087 | 2,653,000 | 0 | 2,416,640 | ||
| 2 | Mar 7, 2026 20:42 | 3,017 | 17,704,550 | 2,655,000 | 0 | 2,420,736 | ||
| 3 | Mar 7, 2026 21:05 | 3,022 | 16,399,091 | 2,659,000 | 0 | 2,420,736 | ||
| 4 | Mar 7, 2026 20:46 | 3,023 | 20,882,610 | 2,660,000 | 0 | 2,416,640 | ||
| 5 | Mar 7, 2026 20:56 | 3,025 | 20,225,600 | 2,662,000 | 0 | 2,428,928 | ||
| 6 | Mar 7, 2026 20:41 | 3,026 | 17,747,338 | 2,663,000 | 0 | 2,420,736 | ||
| 7 | Mar 7, 2026 20:53 | 3,027 | 18,119,923 | 2,664,000 | 0 | 2,420,736 | ||
| 8 | Mar 7, 2026 20:41 | 3,028 | 23,369,655 | 2,665,000 | 0 | 2,424,832 | ||
| 9 | Mar 7, 2026 20:46 | 3,038 | 14,612,830 | 2,673,000 | 0 | 2,424,832 | ||
| 10 | Mar 7, 2026 20:45 | 3,038 | 18,250,712 | 2,673,000 | 0 | 2,428,928 | ||
| 11 | Mar 7, 2026 20:41 | 3,049 | 21,223,590 | 2,683,000 | 0 | 2,420,736 | ||
| 12 | Mar 7, 2026 20:43 | 3,051 | 23,177,106 | 2,685,000 | 0 | 2,424,832 | ||
| 13 | Mar 7, 2026 21:05 | 3,056 | 22,898,908 | 2,689,000 | 0 | 2,424,832 | ||
| 14 | Mar 7, 2026 20:53 | 3,059 | 15,948,752 | 2,692,000 | 0 | 2,420,736 | ||
| 15 | Mar 7, 2026 20:46 | 3,060 | 16,820,198 | 2,693,000 | 0 | 2,531,328 | ||
| 16 | Mar 7, 2026 20:43 | 3,063 | 20,758,246 | 2,695,000 | 0 | 2,424,832 | ||
| 17 | Mar 7, 2026 20:45 | 3,066 | 18,622,123 | 2,698,000 | 0 | 2,416,640 | ||
| 18 | Mar 7, 2026 20:42 | 3,070 | 24,333,990 | 2,702,000 | 0 | 2,269,184 | ||
| 19 | Mar 7, 2026 20:41 | 3,075 | 17,771,912 | 2,706,000 | 0 | 2,416,640 | ||
| 20 | Mar 7, 2026 20:41 | 3,077 | 20,964,661 | 2,708,000 | 0 | 2,416,640 | ||
| 21 | Mar 7, 2026 21:05 | 3,078 | 19,630,892 | 2,709,000 | 0 | 2,420,736 | ||
| 22 | Mar 7, 2026 20:56 | 3,081 | 18,933,482 | 2,711,000 | 0 | 2,428,928 | ||
| 23 | Mar 7, 2026 20:43 | 3,081 | 24,538,810 | 2,711,000 | 0 | 2,416,640 | ||
| 24 | Mar 7, 2026 20:46 | 3,085 | 22,481,547 | 2,715,000 | 0 | 2,420,736 | ||
| 25 | Mar 7, 2026 20:41 | 3,088 | 23,237,113 | 2,717,000 | 0 | 2,420,736 | ||
| 26 | Mar 7, 2026 20:41 | 3,091 | 19,871,591 | 2,720,000 | 0 | 2,269,184 | ||
| 27 | Mar 7, 2026 20:46 | 3,094 | 20,954,205 | 2,723,000 | 0 | 2,424,832 | ||
| 28 | Mar 7, 2026 20:46 | 3,095 | 21,052,934 | 2,724,000 | 0 | 2,416,640 | ||
| 29 | Mar 7, 2026 20:43 | 3,100 | 17,536,883 | 2,728,000 | 0 | 2,416,640 | ||
| 30 | Mar 7, 2026 20:46 | 3,109 | 21,064,925 | 2,736,000 | 0 | 2,420,736 | ||
| 31 | Mar 7, 2026 21:05 | 3,141 | 14,125,336 | 2,764,000 | 0 | 2,420,736 | ||
| 32 | Mar 7, 2026 20:53 | 3,148 | 17,985,770 | 2,770,000 | 0 | 2,420,736 | ||
| 33 | Mar 7, 2026 20:46 | 3,148 | 19,164,755 | 2,770,000 | 0 | 2,420,736 | ||
| 34 | Mar 7, 2026 20:43 | 3,159 | 20,197,847 | 2,780,000 | 0 | 2,428,928 | ||
| 35 | Mar 7, 2026 20:53 | 3,163 | 21,151,763 | 2,783,000 | 0 | 2,424,832 | ||
| 36 | Mar 7, 2026 20:42 | 3,164 | 18,184,429 | 2,784,000 | 0 | 2,420,736 | ||
| 37 | Mar 7, 2026 20:43 | 3,173 | 18,496,379 | 2,792,000 | 0 | 2,424,832 | ||
| 38 | Mar 7, 2026 20:53 | 3,174 | 17,843,289 | 2,793,000 | 0 | 2,416,640 | ||
| 39 | Mar 7, 2026 20:41 | 3,176 | 23,483,194 | 2,795,000 | 0 | 2,424,832 | ||
| 40 | Mar 7, 2026 21:05 | 3,176 | 17,409,951 | 2,795,000 | 0 | 2,420,736 | ||
| 41 | Mar 7, 2026 20:53 | 3,178 | 20,257,754 | 2,797,000 | 0 | 2,416,640 | ||
| 42 | Mar 7, 2026 20:46 | 3,181 | 23,208,773 | 2,799,000 | 0 | 2,420,736 | ||
| 43 | Mar 7, 2026 21:05 | 3,186 | 19,005,773 | 2,804,000 | 0 | 2,416,640 | ||
| 44 | Mar 7, 2026 20:56 | 3,190 | 23,411,635 | 2,807,000 | 0 | 2,527,232 | ||
| 45 | Mar 7, 2026 20:56 | 3,193 | 21,413,447 | 2,810,000 | 0 | 2,416,640 | ||
| 46 | Mar 7, 2026 20:41 | 3,195 | 20,445,056 | 2,812,000 | 0 | 2,420,736 | ||
| 47 | Mar 7, 2026 20:41 | 3,200 | 23,637,164 | 2,816,000 | 0 | 2,420,736 | ||
| 48 | Mar 7, 2026 20:43 | 3,201 | 22,880,267 | 2,817,000 | 0 | 2,416,640 | ||
| 49 | Mar 7, 2026 20:46 | 3,202 | 21,475,028 | 2,818,000 | 0 | 2,527,232 | ||
| 50 | Mar 7, 2026 20:43 | 3,206 | 18,909,218 | 2,821,000 | 0 | 2,424,832 | ||
| 51 | Mar 7, 2026 20:53 | 3,213 | 18,221,031 | 2,827,000 | 0 | 2,424,832 | ||
| 52 | Mar 7, 2026 20:56 | 3,233 | 19,763,161 | 2,845,000 | 0 | 2,269,184 | ||
| 53 | Mar 7, 2026 20:45 | 3,263 | 17,337,620 | 1,914,000 | 957,000 | 2,428,928 | ||
| 54 | Mar 7, 2026 20:53 | 3,276 | 17,500,232 | 961,000 | 1,922,000 | 2,420,736 | ||
| 55 | Mar 7, 2026 21:05 | 3,280 | 18,225,622 | 1,924,000 | 962,000 | 2,408,448 | ||
| 56 | Mar 7, 2026 20:45 | 3,286 | 17,771,712 | 964,000 | 1,928,000 | 2,420,736 | ||
| 57 | Mar 7, 2026 20:41 | 3,310 | 16,179,160 | 1,942,000 | 971,000 | 2,424,832 | ||
| 58 | Mar 7, 2026 21:05 | 3,317 | 24,555,643 | 2,919,000 | 0 | 2,416,640 | ||
| 59 | Mar 7, 2026 20:45 | 3,317 | 17,791,886 | 1,946,000 | 973,000 | 2,416,640 | ||
| 60 | Mar 7, 2026 21:05 | 3,317 | 22,711,505 | 1,946,000 | 973,000 | 2,416,640 | ||
| 61 | Mar 7, 2026 20:56 | 3,318 | 20,661,416 | 2,920,000 | 0 | 2,428,928 | ||
| 62 | Mar 7, 2026 20:45 | 3,318 | 25,293,990 | 1,947,000 | 973,000 | 2,531,328 | ||
| 63 | Mar 7, 2026 21:05 | 3,351 | 16,436,047 | 1,966,000 | 983,000 | 2,269,184 | ||
| 64 | Mar 7, 2026 20:53 | 3,516 | 21,913,642 | 2,063,000 | 1,031,000 | 2,416,640 | ||
| 65 | Mar 7, 2026 20:42 | 3,522 | 14,563,631 | 2,066,000 | 1,033,000 | 2,420,736 | ||
| 66 | Mar 7, 2026 20:42 | 3,550 | 17,542,891 | 2,083,000 | 1,041,000 | 2,416,640 | ||
| 67 | Mar 7, 2026 20:43 | 3,564 | 21,630,612 | 2,091,000 | 1,045,000 | 2,416,640 | ||
| 68 | Mar 7, 2026 20:53 | 3,574 | 16,133,169 | 2,097,000 | 1,048,000 | 2,531,328 | ||
| 69 | Mar 7, 2026 20:43 | 3,645 | 23,315,853 | 2,139,000 | 1,069,000 | 2,424,832 | ||
| 70 | Mar 7, 2026 20:42 | 3,651 | 20,380,612 | 2,142,000 | 1,071,000 | 2,531,328 | ||
| 71 | Mar 7, 2026 20:46 | 3,652 | 17,477,950 | 2,143,000 | 1,071,000 | 2,416,640 | ||
| 72 | Mar 7, 2026 21:05 | 3,655 | 18,601,539 | 2,144,000 | 1,072,000 | 2,420,736 | ||
| 73 | Mar 7, 2026 20:53 | 3,669 | 22,318,910 | 2,153,000 | 1,076,000 | 2,416,640 | ||
| 74 | Mar 7, 2026 21:05 | 3,688 | 14,488,149 | 3,245,000 | 0 | 2,531,328 | ||
| 75 | Mar 7, 2026 20:41 | 3,727 | 20,320,886 | 2,187,000 | 1,093,000 | 2,420,736 | ||
| 76 | Mar 7, 2026 20:43 | 3,747 | 19,987,006 | 3,297,000 | 0 | 2,269,184 | ||
| 77 | Mar 7, 2026 20:53 | 3,768 | 31,594,586 | 3,316,000 | 0 | 2,420,736 | ||
| 78 | Mar 7, 2026 20:46 | 3,807 | 15,914,974 | 3,350,000 | 0 | 2,420,736 |