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 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 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 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 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 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 556th f-tucker 887 63 23ms 6 Feb 2024 556th JunkIce 887 63 24ms 24 Nov 2024 556th Kowalskiexe 🇵🇱 887 63 19ms 19 Apr 2025 556th 123mjb 887 63 24ms 2 Jun 2025 556th DrakeSeteraO 887 63 52ms 24 Oct 2025 556th enigma 887 63 33ms 21 Dec 2025 567th JayXon 🇺🇸 887 74 2,178ms 14 Nov 2024 568th jared-hughes 887 130 22ms 15 Dec 2024 569th lynn 886 65 283ms 5 May 2022 569th GrayJoKing 🇦🇺 886 65 250ms 5 May 2022 569th Sakisan 🇧🇪 886 65 178ms 6 May 2022 569th JayXon 🇺🇸 886 65 301ms 17 Oct 2022 569th Steffan153 🇫🇮 886 65 181ms 12 Nov 2022 569th tobeannouncd 886 65 302ms 25 Apr 2025 569th sean-niemann 🇺🇸 886 65 168ms 9 Jun 2025 576th stefangimmillaro 886 71 89ms 2 Oct 2022 576th Steffan153 🇫🇮 886 71 97ms 23 Feb 2023 576th Shanethegamer 🇺🇸 886 71 93ms 16 May 2023 576th sean-niemann 🇺🇸 886 71 92ms 12 Jul 2024 580th Shanethegamer 🇺🇸 886 72 145ms 8 May 2025 580th edsrzf 🇳🇿 886 72 144ms 4 Jul 2025 580th Yewzir 🇧🇪 886 72 148ms 20 Nov 2025 583rd DialFrost 🇸🇬 886 95 29ms 10 Dec 2024 584th canissimia 🇦🇶 886 110 2,640ms 20 Feb 2023 585th GrayJoKing 🇦🇺 885 77 76ms 13 Sep 2024 586th Steffan153 🇫🇮 884 52 7ms 31 Dec 2022 586th blaztoma 🇱🇹 884 52 8ms 18 Jan 2026 588th CaedenHarper 🇨🇦 884 54 1,451ms 27 Sep 2025 588th sean-niemann 🇺🇸 884 54 1,442ms 27 Sep 2025 588th albanian-laundromat 884 54 959ms 14 Nov 2025 588th xsot 🇸🇬 884 54 1,025ms 15 Nov 2025 592nd albanian-laundromat 884 94 486ms 24 Sep 2025 592nd jkelly467 884 94 401ms 23 Oct 2025 592nd HumanoidCPU 884 94 479ms 8 Nov 2025 595th snoozingnewt 🇨🇦 884 95 118ms 4 Dec 2025 595th Steffan153 🇫🇮 884 95 120ms 11 days ago 597th m-tkach 🇺🇦 883 112 119ms 22 Jun 2025 598th stefangimmillaro 882 53 37ms 2 Oct 2022 598th Haksell 🇦🇶 882 53 42ms 22 Feb 2023 600th GrayJoKing 🇦🇺 882 70 2ms 6 May 2022 600th ovs-code 🇩🇪 882 70 2ms 8 Oct 2023 600th 09cf 882 70 2ms 8 Oct 2023 600th saito-ta 🇯🇵 882 70 2ms 21 Dec 2023 600th sean-niemann 🇺🇸 882 70 2ms 10 Jul 2024 600th KasperKivimaeki 🇫🇮 882 70 6ms 8 Aug 2025 606th frankgraziano 882 75 16ms 14 days ago 607th primo-ppcg 🇹🇭 882 85 39ms 14 Jan 2025 607th MeWhenI 🇻🇦 882 85 41ms 21 Apr 2025 609th SiestaGuru 882 88 411ms 9 Jan 2023 609th rifatx 882 88 390ms 5 Jul 2024 609th kmathis22 882 88 398ms 25 Sep 2025 612th nipzu 882 94 128ms 17 May 2022 612th Natanaelel 🇸🇪 882 94 128ms 17 Jun 2022 612th nkoppel 882 94 130ms 19 Oct 2022 612th ovs-code 🇩🇪 882 94 122ms 21 Jun 2023 612th mousetail 🇳🇱 882 94 126ms 12 Jan 2024 617th Irratix 🇳🇱 882 96 56ms 4 May 2022 617th MeWhenI 🇻🇦 882 96 55ms 1 Jun 2022 617th janbehrens 🇩🇪 882 96 59ms 21 Apr 2023 617th Shanethegamer 🇺🇸 882 96 57ms 15 May 2023 617th Yewzir 🇧🇪 882 96 59ms 11 Nov 2023 617th MateuszPietrzak 🇵🇱 882 96 55ms 18 Nov 2023 617th kkoenig 882 96 56ms 21 Dec 2023 617th BlankSpruce 882 96 58ms 20 Aug 2024 617th fuzzylojik-golf 🇺🇸 882 96 58ms 14 Jun 2025 617th dokutan 882 96 58ms 8 Feb 2026 627th primo-ppcg 🇹🇭 881 52 219ms 5 May 2022 627th dvargas46 🇺🇸 881 52 87ms 22 Dec 2022 629th frosster 🇨🇦 881 77 5ms 8 Feb 2026 630th ovs-code 🇩🇪 881 89 458ms 24 Jul 2024 630th jipsong 🇩🇪 881 89 450ms 7 Apr 2025 630th DialFrost 🇸🇬 881 89 485ms 24 Dec 2025 633rd sisyphus-ppcg 🇦🇺 880 40 347ms 31 Jan 2023 633rd sean-niemann 🇺🇸 880 40 358ms 8 Mar 2025 635th ovs-code 🇩🇪 880 73 340ms 22 Jul 2023 636th sean-niemann 🇺🇸 880 108 278ms 25 May 2024 636th GolfingSuccess 🇬🇷 880 108 289ms 6 Sep 2025 638th primo-ppcg 🇹🇭 880 193 107ms 14 Aug 2025 639th GrayJoKing 🇦🇺 879 72 433ms 31 May 2022 639th Shanethegamer 🇺🇸 879 72 463ms 1 Jun 2022 First Prev 561–640 of 3,594 Next Last