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 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 ><> 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 ALGOL 68 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 ><> 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 ALGOL 68 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 796th IISResetMe 858 52 309ms 7 Apr 2025 796th Ripick 858 52 308ms 1 Jun 2025 803rd jared-hughes 858 72 2ms 6 Jul 2022 803rd Steffan153 🇫🇮 858 72 2ms 3 Jan 2023 803rd MeWhenI 🇻🇦 858 72 3ms 7 May 2023 803rd ListeriaM 858 72 2ms 22 Aug 2023 803rd larcherMTT 858 72 2ms 5 Oct 2024 803rd snyderek 🇺🇸 858 72 3ms 19 Feb 2025 803rd 5quiwyrm 858 72 2ms 29 Jun 2025 803rd TeodorDyakov 🇧🇬 858 72 3ms 8 Jul 2025 803rd xiaoyiming123 858 72 2ms 12 Jul 2025 812th dokutan 858 79 11ms 27 Apr 2024 812th SwordF-Official 🇺🇸 858 79 10ms 16 days ago 814th DialFrost 🇸🇬 857 83 19ms 1 Jan 2026 815th Liibe 857 97 477ms 25 Sep 2025 815th Schmitt-Very-Cool 857 97 434ms 26 Sep 2025 817th frankgraziano 857 198 108ms 14 Oct 2025 818th typeswitch-dev 🇵🇹 856 75 5ms 22 Jul 2023 819th ovs-code 🇩🇪 856 83 54ms 1 Jul 2024 820th 386asm 🇺🇸 856 86 40ms 9 Apr 2023 820th DialFrost 🇸🇬 856 86 43ms 30 Dec 2025 822nd nwellnhof 🇩🇪 856 111 285ms 4 May 2022 822nd stefangimmillaro 856 111 285ms 26 Sep 2023 822nd kkoenig 856 111 290ms 4 Jan 2024 825th Frowny 855 38 40ms 5 May 2022 825th stackofbears 855 38 42ms 14 Mar 2025 827th DialFrost 🇸🇬 855 50 266ms 24 Oct 2023 828th yeminghan2021 855 99 54ms 3 Feb 2025 829th ovs-code 🇩🇪 855 161 1,719ms 14 Sep 2025 830th Shanethegamer 🇺🇸 854 70 99ms 12 Dec 2022 830th Alessandro-Balconi 🇮🇹 854 70 95ms 26 Dec 2022 830th snoozingnewt 🇨🇦 854 70 207ms 22 Nov 2025 833rd henrydukepickle 854 97 128ms 8 Jul 2025 834th aditsu 853 77 2,303ms 23 Nov 2025 835th eshilo-draper 853 91 396ms 4 Sep 2022 835th ericlangedijk 🇸🇮 853 91 428ms 23 May 2023 835th KatieLG 🇬🇧 853 91 419ms 30 Apr 2024 835th Mikey-Beep 🇬🇧 853 91 388ms 3 Sep 2024 839th MeWhenI 🇻🇦 853 92 467ms 10 Oct 2022 839th Betuaredead 853 92 482ms 5 Jan 2023 839th Yax42 🇫🇷 853 92 509ms 4 Oct 2025 842nd Yewzir 🇧🇪 852 65 4ms 9 Oct 2023 842nd MeWhenI 🇻🇦 852 65 3ms 10 Oct 2023 844th Shanethegamer 🇺🇸 852 83 1,374ms 4 May 2022 845th o0lit3 🇺🇸 851 54 7ms 22 Jun 2023 845th Natanaelel 🇸🇪 851 54 7ms 10 Feb 2025 847th SirBogman 🇺🇸 850 55 38ms 5 May 2022 847th olivermrose 🇺🇸 850 55 42ms 6 May 2022 847th 4hg 🇺🇸 850 55 51ms 24 Aug 2022 847th DialFrost 🇸🇬 850 55 43ms 1 Jan 2023 847th error256 850 55 40ms 4 May 2024 852nd mtirado1 850 74 79ms 24 Dec 2022 852nd Betuaredead 850 74 81ms 6 Jan 2023 852nd KatieLG 🇬🇧 850 74 81ms 15 Jan 2023 852nd bwat2 850 74 82ms 31 Mar 2023 852nd stackotter 850 74 78ms 29 May 2023 852nd ovs-code 🇩🇪 850 74 82ms 17 Apr 2024 852nd madeforlosers 850 74 80ms 21 Nov 2024 859th Shanethegamer 🇺🇸 850 99 24ms 27 Apr 2023 860th JayXon 🇺🇸 848 56 1,287ms 9 May 2022 861st the-zammers 847 68 172ms 2 Oct 2023 862nd lynn 847 96 29ms 11 Jul 2023 863rd MeWhenI 🇻🇦 846 26 155ms 25 Aug 2022 863rd AlephSquirrel 846 26 152ms 6 Jan 2023 863rd ovs-code 🇩🇪 846 26 373ms 5 May 2024 863rd saito-ta 🇯🇵 846 26 150ms 12 Dec 2024 867th randolchance 846 63 12ms 8 Jan 2023 867th CatsAreFluffy 846 63 11ms 18 Feb 2023 867th amiralitaheri 846 63 11ms 23 Feb 2023 867th RuyiLi 846 63 10ms 1 Apr 2023 867th TaserTheFox 🇺🇸 846 63 10ms 25 May 2023 867th pfysches-boop 846 63 10ms 6 Aug 2023 867th mhgockel 846 63 11ms 19 Aug 2023 867th NickTheEASDude 🇺🇸 846 63 11ms 18 Jan 2024 867th 823126 846 63 12ms 14 Nov 2024 867th Palladium02 846 63 11ms 12 May 2025 867th 4very 846 63 11ms 10 Jun 2025 867th Ultra814 846 63 10ms 21 Aug 2025 879th NewDefectus 🇮🇱 846 73 3ms 6 May 2022 879th inventshah 846 73 2ms 12 Jun 2022 First Prev 801–880 of 3,556 Next Last