Kolakoski Sequence in all languages in chars. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Binary Lambda Calculus Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E APL ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Binary Lambda Calculus Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 801st marcin7Cd 710 103 21ms 12 Feb 2021 802nd Feniske 🇫🇷 709 51 270ms 21 Nov 2023 803rd CaedenHarper 🇨🇦 709 84 435ms 17 Oct 2025 804th aadenboy 🇺🇸 709 86 2ms 16 Dec 2025 805th chordowl 709 92 116ms 17 Mar 2021 806th rucin93 🇵🇱 707 60 131ms 9 Aug 2024 807th omurakazuaki 🇯🇵 706 66 13ms 18 Feb 2021 807th BambooleanLogic 🇸🇪 706 66 11ms 22 Aug 2022 807th coreynash 706 66 10ms 21 Oct 2023 807th two-bad 🇬🇧 706 66 12ms 24 Nov 2023 807th dylanarmstrong 706 66 11ms 15 Jan 2024 807th madeforlosers 706 66 13ms 5 Nov 2025 813th Stockoh 🇫🇷 706 68 427ms 24 Jun 2024 813th JunkIce 706 68 442ms 3 Dec 2024 815th typeswitch-dev 🇵🇹 705 74 8ms 7 Aug 2023 816th antimon2 🇯🇵 704 65 495ms 19 Jan 2021 816th msbranicky 704 65 1,289ms 12 Sep 2023 818th osmith93 704 70 25ms 14 Jun 2021 818th ridingqwerty 🇺🇸 704 70 12ms 23 Feb 2024 818th mbittner20 704 70 11ms 15 Jul 2024 818th RaBa21 🇭🇺 704 70 12ms 18 Jul 2025 822nd Shanethegamer 🇺🇸 704 91 39ms 16 Jun 2022 823rd Herbert00709 🇵🇱 704 101 56ms 19 Nov 2024 824th SnowballSH 703 60 36ms 12 Feb 2021 824th aksyristos 703 60 41ms 28 Feb 2023 824th Lv0Sys 🇵🇱 703 60 37ms 4 Dec 2025 827th primo-ppcg 🇹🇭 702 47 1,032ms 5 Feb 2022 828th MeWhenI 🇻🇦 702 238 12ms 29 Aug 2023 829th UnderKoen 🇳🇱 700 134 13ms 20 Jan 2025 830th jared-hughes 699 44 6ms 31 Jul 2022 831st NewDefectus 🇮🇱 699 76 2ms 25 Oct 2021 831st JohandeRuiter 🇳🇱 699 76 2ms 3 Dec 2023 833rd Shanethegamer 🇺🇸 699 77 13ms 9 Oct 2023 834th targrik 698 123 299ms 10 Jul 2025 835th jared-hughes 698 159 1,670ms 16 Sep 2025 836th AlephSquirrel 696 34 49ms 30 Dec 2022 837th neihousaigaai 696 67 11ms 10 Apr 2021 838th Jacob385 696 69 436ms 22 Apr 2024 839th targrik 695 57 5ms 26 Aug 2025 840th SnowballSH 694 71 11ms 12 Feb 2021 840th Andre3582 694 71 11ms 18 Mar 2021 840th PhysicDev 🇫🇷 694 71 10ms 20 May 2021 840th Alban-Boissard 694 71 12ms 10 Jun 2025 844th boxjelly 694 94 114ms 21 Jan 2021 844th YAJUE114514 694 94 133ms 24 Jul 2025 846th edsrzf 🇳🇿 692 91 22ms 21 Dec 2024 847th Espiobest 691 61 38ms 13 Feb 2021 847th DaCuteRaccoon 691 61 37ms 9 Dec 2022 849th JGDoerrer 691 103 402ms 5 Jan 2022 849th tailorspy 691 103 58ms 29 Oct 2023 851st Shanethegamer 🇺🇸 690 106 17ms 4 Oct 2024 852nd msbranicky 689 95 5ms 11 Aug 2023 853rd NewDefectus 🇮🇱 688 32 34ms 20 Dec 2021 854th GolfingSuccess 🇬🇷 688 69 33ms 17 Aug 2024 855th Andriamanitra 🇫🇮 687 95 148ms 20 Jul 2023 856th KasperKivimaeki 🇫🇮 687 125 302ms 3 Oct 2025 857th msbranicky 685 89 2ms 26 Sep 2023 858th LeeCamp 684 72 10ms 16 Feb 2022 858th LukasFolwarczny 🇨🇿 684 72 10ms 16 Sep 2022 858th CutSandstone 684 72 38ms 8 Jul 2024 861st Shanethegamer 🇺🇸 680 126 24ms 8 Jul 2021 862nd dokutan 678 59 3ms 18 Jul 2025 863rd Yewzir 🇧🇪 677 88 421ms 14 Oct 2023 864th jared-hughes 676 35 44ms 31 Jul 2022 864th Natanaelel 🇸🇪 676 35 51ms 18 Aug 2022 866th SirBogman 🇺🇸 676 44 197ms 22 Oct 2021 867th richard-oelze 🇩🇪 675 73 30ms 4 Apr 2021 867th mauro-1 🇮🇹 675 73 9ms 18 Aug 2021 867th gchenfc 675 73 9ms 24 Jan 2022 867th hiichbindermax 675 73 11ms 26 Feb 2022 867th Omega65536 🇩🇪 675 73 11ms 24 Nov 2022 867th sandorstormen 675 73 11ms 18 Feb 2023 867th Mr-McChicken 675 73 10ms 15 Oct 2023 867th Masttest 675 73 10ms 21 Feb 2024 875th dokutan 675 99 372ms 24 Sep 2025 876th janbehrens 🇩🇪 673 68 1,239ms 9 Apr 2021 877th madex 🇩🇪 673 79 2ms 11 Jul 2024 878th msbranicky 672 80 4ms 11 Oct 2023 879th I-Love-47 🇺🇦 671 106 59ms 10 Feb 2022 880th 5quiwyrm 670 54 288ms 5 Dec 2024 First Prev 801–880 of 1,903 Next Last