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 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 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 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 Calendar 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 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 Arturo Befunge BQN CJam CoffeeScript Egel Erlang Fennel Harbour Hare Haxe Hush Hy iogii Knight 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 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 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 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 Calendar 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 Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Chars Time Submitted 502nd SebassNoob 888 60 10ms 5 Aug 2025 502nd Yax42 🇫🇷 888 60 10ms 5 Sep 2025 502nd levinwinter 888 60 12ms 22 Oct 2025 502nd Cube14yt 888 60 12ms 9 days ago 502nd gigaprofisi 🇺🇸 888 60 12ms 7 days ago 531st m-tkach 🇺🇦 888 117 27ms 7 May 2022 531st Lydxn 🇨🇦 888 117 28ms 7 May 2022 533rd P-Quentin 🇫🇷 887 63 20ms 3 Aug 2022 533rd kaptsanovb 887 63 24ms 20 Apr 2023 533rd fkantelberg 887 63 20ms 14 Jul 2023 533rd snoozingnewt 🇺🇸 887 63 35ms 10 Sep 2023 533rd VictorStenvers 🇳🇱 887 63 22ms 13 Nov 2023 533rd 1231234md5 🇨🇳 887 63 21ms 14 Dec 2023 533rd f-tucker 887 63 22ms 6 Feb 2024 533rd JunkIce 887 63 22ms 24 Nov 2024 533rd Kowalskiexe 🇵🇱 887 63 21ms 19 Apr 2025 533rd 123mjb 887 63 22ms 2 Jun 2025 533rd DrakeSeteraO 887 63 51ms 24 Oct 2025 544th RockOfStone 887 73 5ms 20 Oct 2025 545th JayXon 🇺🇸 887 74 3,078ms 14 Nov 2024 546th Shanethegamer 🇺🇸 886 61 6ms 31 Oct 2022 546th MeWhenI 🇻🇦 886 61 5ms 4 Nov 2022 548th lynn 886 65 316ms 5 May 2022 548th GrayJoKing 🇦🇺 886 65 327ms 5 May 2022 548th Sakisan 🇧🇪 886 65 214ms 6 May 2022 548th JayXon 🇺🇸 886 65 366ms 17 Oct 2022 548th Steffan153 🇫🇮 886 65 172ms 12 Nov 2022 548th tobeannouncd 886 65 331ms 25 Apr 2025 548th sean-niemann 🇺🇸 886 65 174ms 9 Jun 2025 555th stefangimmillaro 886 71 89ms 2 Oct 2022 555th Steffan153 🇫🇮 886 71 90ms 23 Feb 2023 555th Shanethegamer 🇺🇸 886 71 89ms 16 May 2023 555th sean-niemann 🇺🇸 886 71 87ms 12 Jul 2024 559th Shanethegamer 🇺🇸 886 72 90ms 8 May 2025 559th edsrzf 🇳🇿 886 72 103ms 4 Jul 2025 559th Yewzir 🇧🇪 886 72 92ms 4 days ago 562nd DialFrost 🇸🇬 886 95 32ms 10 Dec 2024 563rd canissimia 🇦🇶 886 110 3,068ms 20 Feb 2023 564th canissimia 🇦🇶 886 204 16ms 25 Nov 2023 565th GrayJoKing 🇦🇺 885 77 76ms 13 Sep 2024 566th jared-hughes 885 130 23ms 15 Dec 2024 567th Steffan153 🇫🇮 884 52 7ms 31 Dec 2022 568th albanian-laundromat 884 94 339ms 24 Sep 2025 568th jkelly467 884 94 339ms 23 Oct 2025 568th HumanoidCPU 884 94 337ms 17 days ago 571st DialFrost 🇸🇬 883 76 81ms 17 Mar 2025 572nd primo-ppcg 🇹🇭 882 85 43ms 14 Jan 2025 572nd MeWhenI 🇻🇦 882 85 44ms 21 Apr 2025 574th SiestaGuru 882 88 314ms 9 Jan 2023 574th rifatx 882 88 327ms 5 Jul 2024 574th kmathis22 882 88 343ms 25 Sep 2025 574th arcpolaris 882 88 344ms 17 days ago 578th primo-ppcg 🇹🇭 881 52 213ms 5 May 2022 578th dvargas46 🇺🇸 881 52 83ms 22 Dec 2022 580th stefangimmillaro 881 53 38ms 2 Oct 2022 580th Haksell 🇦🇶 881 53 40ms 22 Feb 2023 582nd DialFrost 🇸🇬 881 56 820ms 1 Sep 2025 583rd GrayJoKing 🇦🇺 881 70 2ms 6 May 2022 583rd ovs-code 🇩🇪 881 70 2ms 8 Oct 2023 583rd 09cf 881 70 13ms 8 Oct 2023 583rd saito-ta 🇯🇵 881 70 3ms 21 Dec 2023 583rd sean-niemann 🇺🇸 881 70 3ms 10 Jul 2024 583rd KasperKivimaeki 🇫🇮 881 70 6ms 8 Aug 2025 589th ovs-code 🇩🇪 881 89 457ms 24 Jul 2024 589th jipsong 🇩🇪 881 89 467ms 7 Apr 2025 591st nipzu 881 94 129ms 17 May 2022 591st Natanaelel 🇸🇪 881 94 130ms 17 Jun 2022 591st nkoppel 881 94 123ms 19 Oct 2022 591st ovs-code 🇩🇪 881 94 125ms 21 Jun 2023 591st mousetail 🇳🇱 881 94 127ms 12 Jan 2024 596th Irratix 🇳🇱 881 96 55ms 4 May 2022 596th MeWhenI 🇻🇦 881 96 53ms 1 Jun 2022 596th janbehrens 🇩🇪 881 96 54ms 21 Apr 2023 596th Shanethegamer 🇺🇸 881 96 57ms 15 May 2023 596th Yewzir 🇧🇪 881 96 55ms 11 Nov 2023 First Prev 526–600 of 3,461 Next Last