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Collatz 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 Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Nim Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 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 ArkScript 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 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 Continued Fractions 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 Gray Code Decoder Gray Code Encoder 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers NFA Simulator Nim Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 796th TransformLikeATensor 860 65 21ms 17 Oct 2025 802nd Andriamanitra 🇫🇮 860 67 144ms 26 Apr 2023 803rd ulucs 859 35 9ms 8 May 2022 803rd bstrat 859 35 9ms 6 Jun 2024 803rd wh3n3v3r 🇨🇿 859 35 8ms 18 Nov 2024 806th rucin93 🇵🇱 859 57 141ms 4 Aug 2024 806th dokutan 859 57 133ms 9 Aug 2024 808th dokutan 859 79 10ms 27 Apr 2024 808th SwordF-Official 🇺🇸 859 79 10ms 1 Feb 2026 810th MeWhenI 🇻🇦 859 81 8ms 23 May 2023 811th MeWhenI 🇻🇦 859 145 1,208ms 28 Mar 2025 812th JRaspass 🇬🇧 858 41 396ms 4 May 2022 812th SirBogman 🇺🇸 858 41 268ms 4 May 2022 812th Natanaelel 🇸🇪 858 41 390ms 4 May 2022 815th 5quiwyrm 858 52 264ms 4 Sep 2022 815th MeWhenI 🇻🇦 858 52 333ms 28 Jan 2023 815th Feniske 🇫🇷 858 52 254ms 7 Nov 2023 815th dcgjb 858 52 356ms 29 Jan 2024 815th JPRuskin 🇬🇧 858 52 263ms 7 Apr 2025 815th IISResetMe 858 52 232ms 7 Apr 2025 815th Ripick 858 52 237ms 1 Jun 2025 815th madex 🇩🇪 858 52 271ms 16 Mar 2026 823rd jared-hughes 858 72 2ms 6 Jul 2022 823rd Steffan153 🇫🇮 858 72 2ms 3 Jan 2023 823rd MeWhenI 🇻🇦 858 72 2ms 7 May 2023 823rd ListeriaM 858 72 2ms 22 Aug 2023 823rd larcherMTT 858 72 2ms 5 Oct 2024 823rd snyderek 🇺🇸 858 72 2ms 19 Feb 2025 823rd 5quiwyrm 858 72 2ms 29 Jun 2025 823rd TeodorDyakov 🇧🇬 858 72 3ms 8 Jul 2025 823rd xiaoyiming123 858 72 2ms 12 Jul 2025 832nd typeswitch-dev 🇵🇹 858 75 4ms 22 Jul 2023 833rd Shanethegamer 🇺🇸 858 81 17ms 19 Dec 2023 833rd emgordon154 858 81 20ms 29 Jul 2025 835th ovs-code 🇩🇪 857 83 57ms 1 Jul 2024 836th 386asm 🇺🇸 857 86 40ms 9 Apr 2023 836th DialFrost 🇸🇬 857 86 43ms 30 Dec 2025 838th Liibe 857 97 562ms 25 Sep 2025 838th Schmitt-Very-Cool 857 97 456ms 26 Sep 2025 840th frankgraziano 857 198 108ms 14 Oct 2025 841st yeminghan2021 856 99 57ms 3 Feb 2025 842nd nwellnhof 🇩🇪 856 111 308ms 4 May 2022 842nd stefangimmillaro 856 111 341ms 26 Sep 2023 842nd kkoenig 856 111 319ms 4 Jan 2024 845th emgordon154 856 159 1,737ms 24 Dec 2025 845th DialFrost 🇸🇬 856 159 1,683ms 17 Jan 2026 847th Frowny 855 38 40ms 5 May 2022 847th stackofbears 855 38 42ms 14 Mar 2025 849th DialFrost 🇸🇬 855 50 226ms 24 Oct 2023 850th Shanethegamer 🇺🇸 855 70 105ms 12 Dec 2022 850th Alessandro-Balconi 🇮🇹 855 70 106ms 26 Dec 2022 850th snoozingnewt 🇨🇦 855 70 222ms 22 Nov 2025 853rd aditsu 855 77 2,433ms 23 Nov 2025 854th eshilo-draper 854 91 425ms 4 Sep 2022 854th ericlangedijk 🇸🇮 854 91 437ms 23 May 2023 854th KatieLG 🇬🇧 854 91 413ms 30 Apr 2024 854th Mikey-Beep 🇬🇧 854 91 365ms 3 Sep 2024 858th henrydukepickle 854 97 132ms 8 Jul 2025 859th MeWhenI 🇻🇦 853 92 467ms 10 Oct 2022 859th Betuaredead 853 92 480ms 5 Jan 2023 859th Yax42 🇫🇷 853 92 459ms 4 Oct 2025 862nd o0lit3 🇺🇸 852 54 7ms 22 Jun 2023 862nd Natanaelel 🇸🇪 852 54 7ms 10 Feb 2025 864th Yewzir 🇧🇪 852 65 4ms 9 Oct 2023 864th MeWhenI 🇻🇦 852 65 4ms 10 Oct 2023 866th DialFrost 🇸🇬 851 86 1,476ms 10 Mar 2025 867th mtirado1 850 74 94ms 24 Dec 2022 867th Betuaredead 850 74 88ms 6 Jan 2023 867th KatieLG 🇬🇧 850 74 94ms 15 Jan 2023 867th bwat2 850 74 87ms 31 Mar 2023 867th stackotter 850 74 91ms 29 May 2023 867th ovs-code 🇩🇪 850 74 93ms 17 Apr 2024 873rd DialFrost 🇸🇬 850 76 82ms 17 Mar 2025 874th Shanethegamer 🇺🇸 850 99 25ms 27 Apr 2023 875th JayXon 🇺🇸 848 56 1,322ms 9 May 2022 876th shinh 847 52 38ms 29 Jun 2022 876th MeWhenI 🇻🇦 847 52 70ms 25 Jul 2023 878th the-zammers 847 68 165ms 2 Oct 2023 879th dokutan 847 82 21ms 1 Jul 2024 880th lynn 847 96 29ms 11 Jul 2023 881st jared-hughes 847 100 63ms 20 Jul 2022 881st ZakkkkAttackkkk 🇵🇭 847 100 63ms 10 Aug 2022 881st Walter225 847 100 62ms 25 Jul 2023 884th MeWhenI 🇻🇦 846 26 159ms 25 Aug 2022 884th AlephSquirrel 846 26 155ms 6 Jan 2023 884th ovs-code 🇩🇪 846 26 367ms 5 May 2024 884th saito-ta 🇯🇵 846 26 154ms 12 Dec 2024 888th Natanaelel 🇸🇪 846 57 453ms 17 Jan 2024 888th Kacarott 🇦🇺 846 57 461ms 10 Sep 2024 888th albanian-laundromat 🇺🇸 846 57 463ms 7 Oct 2025 891st randolchance 846 63 12ms 8 Jan 2023 891st CatsAreFluffy 846 63 14ms 18 Feb 2023 891st amiralitaheri 846 63 13ms 23 Feb 2023 891st RuyiLi 846 63 13ms 1 Apr 2023 891st TaserTheFox 🇺🇸 846 63 15ms 25 May 2023 891st pfysches-boop 846 63 12ms 6 Aug 2023 891st mhgockel 846 63 14ms 19 Aug 2023 891st NickTheEASDude 🇺🇸 846 63 11ms 18 Jan 2024 891st 823126 846 63 15ms 14 Nov 2024 891st Palladium02 846 63 11ms 12 May 2025 First Prev 801–900 of 3,664 Next Last