Collatz in all languages in bytes. Cheevos Holes Recent Holes Langs Medals Misc 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 Bytes Time Submitted 525th Steffan153 🇫🇮 892 71 90ms 23 Feb 2023 525th Shanethegamer 🇺🇸 892 71 89ms 16 May 2023 525th sean-niemann 🇺🇸 892 71 92ms 12 Jul 2024 529th RockOfStone 892 73 5ms 20 Oct 2025 530th sean-niemann 🇺🇸 892 109 261ms 25 May 2024 530th GolfingSuccess 🇬🇷 892 109 252ms 6 Sep 2025 532nd lynn 891 65 316ms 5 May 2022 532nd GrayJoKing 🇦🇺 891 65 327ms 5 May 2022 532nd Sakisan 🇧🇪 891 65 214ms 6 May 2022 532nd JayXon 🇺🇸 891 65 366ms 17 Oct 2022 532nd Steffan153 🇫🇮 891 65 172ms 12 Nov 2022 532nd tobeannouncd 891 65 331ms 25 Apr 2025 532nd sean-niemann 🇺🇸 891 65 174ms 9 Jun 2025 539th GrayJoKing 🇦🇺 891 77 76ms 13 Sep 2024 540th DialFrost 🇸🇬 891 95 32ms 10 Dec 2024 541st canissimia 🇦🇶 891 110 3,068ms 20 Feb 2023 542nd primo-ppcg 🇹🇭 890 52 213ms 5 May 2022 542nd dvargas46 🇺🇸 890 52 83ms 22 Dec 2022 544th jared-hughes 890 130 23ms 15 Dec 2024 545th mousetail 🇳🇱 888 41 73ms 29 Aug 2025 546th MeWhenI 🇻🇦 888 53 41ms 1 Jun 2022 546th stefangimmillaro 888 53 38ms 2 Oct 2022 546th Haksell 🇦🇶 888 53 40ms 22 Feb 2023 549th primo-ppcg 🇹🇭 888 85 43ms 14 Jan 2025 549th MeWhenI 🇻🇦 888 85 44ms 21 Apr 2025 551st canissimia 🇦🇶 888 204 16ms 25 Nov 2023 552nd albanian-laundromat 887 94 339ms 24 Sep 2025 552nd jkelly467 887 94 339ms 23 Oct 2025 552nd HumanoidCPU 887 94 337ms 13 days ago 555th Shanethegamer 🇺🇸 886 70 93ms 12 Dec 2022 555th Alessandro-Balconi 🇮🇹 886 70 88ms 26 Dec 2022 557th ovs-code 🇩🇪 886 73 300ms 22 Jul 2023 558th janbehrens 🇩🇪 886 90 442ms 21 Apr 2023 558th Yewzir 🇧🇪 886 90 463ms 22 Apr 2023 558th DialFrost 🇸🇬 886 90 440ms 6 Nov 2023 558th Ripick 886 90 439ms 27 Nov 2024 562nd m-tkach 🇺🇦 886 112 69ms 22 Jun 2025 563rd GolfingSuccess 🇬🇷 885 71 2ms 5 May 2022 563rd emplv 🇱🇻 885 71 3ms 5 May 2022 563rd JayXon 🇺🇸 885 71 2ms 7 May 2022 563rd nwellnhof 🇩🇪 885 71 2ms 5 Jun 2022 563rd stefangimmillaro 885 71 2ms 2 Jun 2023 563rd 09cf 885 71 2ms 4 Oct 2023 563rd kkoenig 885 71 3ms 21 Dec 2023 563rd sean-niemann 🇺🇸 885 71 3ms 10 Jul 2024 563rd masinag 🇮🇹 885 71 2ms 6 Oct 2024 572nd SiestaGuru 885 88 314ms 9 Jan 2023 572nd rifatx 885 88 327ms 5 Jul 2024 572nd kmathis22 885 88 343ms 25 Sep 2025 572nd arcpolaris 885 88 344ms 13 days ago 576th m-tkach 🇺🇦 884 59 511ms 21 Jan 2024 576th GolfingSuccess 🇬🇷 884 59 561ms 20 Jan 2025 578th steffan-polygolf 884 74 130ms 14 Feb 2024 579th kg583 🇺🇸 884 84 17ms 30 Jul 2025 580th nipzu 884 94 129ms 17 May 2022 580th Natanaelel 🇸🇪 884 94 130ms 17 Jun 2022 580th nkoppel 884 94 123ms 19 Oct 2022 580th ovs-code 🇩🇪 884 94 125ms 21 Jun 2023 580th mousetail 🇳🇱 884 94 127ms 12 Jan 2024 585th MeWhenI 🇻🇦 884 110 255ms 9 Feb 2023 585th edsrzf 🇳🇿 884 110 247ms 28 Nov 2024 585th targrik 884 110 248ms 30 Jun 2025 588th MichalMarsalek 🇨🇿 883 70 18ms 5 May 2022 588th primo-ppcg 🇹🇭 883 70 23ms 5 May 2022 588th SirBogman 🇺🇸 883 70 29ms 5 May 2022 588th prplz 🇦🇺 883 70 18ms 5 May 2022 588th Irratix 🇳🇱 883 70 16ms 7 May 2022 588th rak1507 🇬🇧 883 70 20ms 7 May 2022 588th inventshah 883 70 16ms 9 May 2022 588th k3w1k0d3r 883 70 19ms 22 Jun 2022 588th ZakkkkAttackkkk 🇵🇭 883 70 16ms 14 Jul 2022 588th Bonjour27891 🇻🇳 883 70 19ms 14 Jul 2022 588th OllieBoyne 🇬🇧 883 70 19ms 19 Jul 2022 588th bricknellj 883 70 17ms 25 Jul 2022 588th wen1now 883 70 21ms 8 Aug 2022 First Prev 526–600 of 3,480 Next Last