150 How slow is Python really? (Or how fast is your language?) 2014-04-26T18:26:17.890
71 Contest: fastest way to sort a big array of Gaussian-distributed data 2011-06-07T12:58:58.813
66 Calculate the number of primes up to n 2016-02-26T19:08:02.277
52 How Slow Is Python Really (Part II)? 2014-04-28T16:47:41.103
46 Extending OEIS: Counting Diamond Tilings 2015-06-04T12:22:11.520
45 Help Indiana Jones to get the treasure 2011-12-03T01:58:00.977
37 Find the largest prime whose length, sum and product is prime 2014-07-31T03:43:40.670
34 How high can you go? (A coding+algorithms challenge) 2014-04-30T20:47:41.673
31 Fastest yes in the west 2020-02-14T21:40:15.447
28 Fastest semiprime factorization 2012-10-07T05:16:00.663
28 Calculate the permanent as quickly as possible 2016-10-22T08:30:36.173
27 Approximating a special case of the Riemann Theta function 2016-04-04T12:12:25.843
26 Fastest Mini-Flak Quine 2016-12-30T22:00:32.810
26 Delete some bits and count 2018-05-28T08:12:21.583
26 Bentley's coding challenge: k most frequent words 2019-07-10T11:47:12.050
25 Prime containment numbers (speed edition) 2018-11-30T07:25:41.263
25 Buildings made from cubes 2020-01-18T11:02:44.470
24 Compute the maximum number of runs possible for as large a string as possible 2016-07-06T08:49:46.147
23 Fastest Home Prime Generator 2017-01-25T02:30:16.553
22 Super speedy totient function 2014-05-07T00:17:07.950
22 Products that equal a sum and vice versa 2017-07-30T20:07:35.713
22 Build an Electrical Grid 2017-11-25T08:59:07.893
22 The Missing Number Revised 2017-12-06T02:52:28.073
21 The fastest Sudoku solver 2019-08-23T11:45:04.630
20 Forming Polyominoes with a Chain of Rods 2014-12-04T22:38:49.200
20 Plant trees in a park - As fast as you can! 2017-06-23T13:27:43.480
19 The number of possible numeric outcomes of parenthesizations of 2^2^...^2 2013-05-09T15:16:05.430
19 Sum of smallest prime factors 2015-07-12T23:39:55.453
18 Finding all-but-one matches 2015-02-27T14:54:25.110
18 Find the number of n-by-n (-1, 0, 1) matrices with zero permanent as quickly as possible 2019-12-06T14:21:28.793
17 Fastest code to find the next prime 2013-02-16T10:34:02.897
17 Fastest tweetable integer factorizer 2017-07-08T19:10:29.513
16 Longest non-repeating Game-of-Life sequence 2013-01-06T20:28:49.073
16 Fast Trig Calculation 2014-06-04T16:43:53.507
16 Fastest player for Dots and Boxes 2014-06-06T21:25:18.660
16 Find all the Solutions to this Number Puzzle in the Shortest Time Possible 2016-05-20T17:36:07.207
16 Permutations such that no k+2 points fall on any polynomial of degree k 2018-03-27T00:06:23.173
15 Fastest Sort in BrainF*** 2012-01-25T02:28:26.590
15 Integral triangles and integral medians 2015-07-14T13:55:22.130
14 Fastest python code to find a set of winning words in this game 2011-04-29T13:18:48.417
14 Find the maximum determinant for each size Toeplitz matrix 2015-07-09T15:08:25.940
14 Quickly express a number with only 0-9 and the four operations, plus one more extra 2016-04-17T01:41:47.993
14 Finding approximate correlations 2017-06-03T19:19:07.807
13 Digit sum of central binomial coefficients 2014-09-03T19:26:37.697
13 Be an Epidemiologist! 2014-10-02T17:00:43.143
13 Read a crossword with a twist! 2016-12-18T18:05:14.180
13 Count how many distance sequences are far from all others 2017-03-13T09:16:13.153
13 Fastest Approximate Common Divisor 2017-05-30T17:30:31.333
12 Break the broken cipher 2011-02-27T20:37:18.973
12 How much can you quickly multiply? 2014-05-06T11:34:39.803
12 False Positives on an Integer Lattice 2014-09-11T14:23:29.667
12 Count the number of Hankelable matrices 2015-04-11T11:47:11.580
12 Calculate the Hafnian as quickly as possible 2018-03-02T15:16:01.223
11 Fast Topswops calculation 2011-01-27T23:00:59.460
11 Filter a large file quickly 2014-05-05T20:12:10.653
11 Constructing an Orthogonal-Diagonal Greco-Latin Square 2015-03-16T15:06:06.670
11 Magic Sequences of length n 2015-05-14T00:10:34.727
11 Fastest Longest Common Subsequence Finder 2015-07-17T18:41:17.290
11 Count arrays of periods 2017-08-03T18:32:57.550
11 Block partition a string 2018-06-06T16:22:01.343
11 Count arrays that make unique sets 2018-10-21T09:15:48.160
11 Can you calculate the average Levenshtein distance exactly? 2019-12-29T20:41:36.757
10 Write the fastest Fibonacci 2011-07-16T16:51:42.787
10 Random sampling without replacement 2012-01-27T00:01:56.953
10 Quickly divide in Manufactoria 2013-06-11T15:59:19.667
10 Count balanced binary strings matching any of a set of masks 2015-05-13T19:05:09.653
10 Supersonic domino tilings 2015-05-31T13:31:41.570
10 Calculate a probability exactly and quickly 2015-06-08T16:39:33.403
10 Probabilities - how high can you go? 2015-06-12T08:49:04.337
10 Too many pawns on a chess board 2015-06-25T09:03:01.727
10 Set Theoretic Arithmetic (+ and *) 2015-11-17T01:59:55.143
10 Tic-tac-toe with only crosses as quick as possible 2016-03-30T17:54:16.337
10 Roll to see all sides! 2017-06-05T07:59:27.680
10 Compute OEIS A005434 2017-06-16T11:38:49.063
10 Biggest square in a grid 2018-01-02T03:38:16.403
10 Arbitrary Randomness (Speed edition) 2018-11-20T18:23:10.783
9 Fast line drawing algorithm 2011-01-27T22:38:16.347
9 The Tax Historian 2017-01-23T18:12:31.027
9 Count the number of Hamming distance sequences 2017-03-24T17:24:08.363
9 How many draws are there in Quarto? 2018-01-29T22:16:38.890
9 Count arrays that are really unique 2018-11-07T20:04:44.937
8 List prime-factorized natural numbers up to N in ascending order 2012-09-07T12:03:11.720
8 Counting orthogonal circulant matrices 2016-01-11T17:31:48.137
8 Compute OEIS A161169, approximately and quickly 2019-10-07T18:14:13.347
7 Enumerate all number that are palindromic in at least two of base 2, 8, 10, 16 or 64 2013-11-12T13:46:34.343
7 Filter a large file in small memory 2014-05-14T20:14:15.340
7 Write a FAST word equation solver 2014-07-22T10:18:40.403
7 'Number' Crunching Benchmark 2014-07-27T01:02:51.417
7 2nd byte bias of RC4 2014-07-31T18:15:24.303
7 Un-hash the Java Hash 2014-09-25T03:36:19.723
7 Snakes and Ladders probability of winning 2015-06-27T15:32:34.283
7 The Missing Number - Version 2 2017-12-11T02:32:32.347
7 Average number of strings with Levenshtein distance up to 4 2020-01-15T12:20:22.150
6 Code-Challenge: Farey sequence (II) 2011-03-30T15:11:18.283
6 Lottery Ball Problem 2011-06-29T16:18:50.977
6 Sudoku board generator 2012-01-27T00:08:19.267
6 The making of "Spot It!": Finding almost unique sets 2013-03-16T18:06:30.763
6 Super fast sampling from a tricky random distribution 2014-05-17T19:06:28.973
6 Optimal Minesweeper on the Largest Board 2014-07-10T06:26:30.817