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 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 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 Transpose Sentence United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Hilbert Curve Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle 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 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 Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 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 Groovy Harbour Hare Haxe Hush Hy iogii Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua 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 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 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 Transpose Sentence United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Calendar Connect Four CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Hilbert Curve Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Snake Sphenic Numbers Trinomial Triangle Turtle Tutorial # Golfer Points Bytes Time 585th FEZfan 🇦🇺 900 74 19 Apr 2025 585th Squimbletin 900 74 19 Apr 2025 585th Kowalskiexe 🇵🇱 900 74 19 Apr 2025 585th Dandandooo 900 74 23 Apr 2025 585th khangtm123 900 74 4 May 2025 585th 40fied4t 900 74 6 May 2025 585th keelimeguy 🇺🇸 900 74 13 May 2025 585th TheZwierzLF 🇵🇱 900 74 21 May 2025 585th kbeat 🇰🇿 900 74 21 May 2025 585th LvLError 900 74 29 May 2025 585th Lv0Sys 🇵🇱 900 74 30 May 2025 585th ffelixm 900 74 3 Jun 2025 585th Flekay 900 74 14 days ago 585th DoubleUynn 900 74 7 days ago 690th edsrzf 🇳🇿 900 83 14 Jan 2025 690th kg583 🇺🇸 900 83 14 Feb 2025 692nd SirBogman 🇺🇸 899 50 5 May 2022 692nd nwellnhof 🇩🇪 899 50 3 Jun 2022 692nd Lydxn 🇨🇦 899 50 15 Aug 2022 692nd Steffan153 🇫🇮 899 50 9 Aug 2024 696th Steffan153 🇫🇮 899 82 1 Apr 2023 696th sean-niemann 🇺🇸 899 82 12 Jul 2024 698th DialFrost 🇸🇬 897 29 15 Mar 2025 699th Lydxn 🇨🇦 897 48 5 May 2022 699th pabloferz 897 48 6 Mar 2024 701st DialFrost 🇸🇬 897 69 15 Jul 2024 702nd GrayJoKing 🇦🇺 897 70 6 May 2022 702nd saito-ta 🇯🇵 897 70 21 Dec 2023 702nd ovs-code 🇩🇪 897 70 17 Feb 2024 705th nwellnhof 🇩🇪 897 111 4 May 2022 705th emplv 🇱🇻 897 111 5 May 2022 705th Shanethegamer 🇺🇸 897 111 21 Nov 2023 708th Steffan153 🇫🇮 896 59 10 Aug 2024 708th rucin93 🇵🇱 896 59 13 Oct 2024 708th sean-niemann 🇺🇸 896 59 13 Oct 2024 708th lukegustafson 🇺🇸 896 59 24 Oct 2024 712th Ripick 895 73 8 May 2023 713th edsrzf 🇳🇿 895 78 26 Oct 2024 714th SiestaGuru 895 131 9 Jan 2023 714th HumanoidCPU 895 131 7 May 2024 716th MichalMarsalek 🇨🇿 894 87 5 May 2022 716th Kloppermand 🇩🇰 894 87 7 Oct 2022 716th bwat2 894 87 6 Apr 2023 719th ovs-code 🇩🇪 894 89 24 Jul 2024 719th jipsong 🇩🇪 894 89 7 Apr 2025 721st Lydxn 🇨🇦 893 72 16 Jul 2023 722nd GrayJoKing 🇦🇺 893 91 19 Jan 2023 723rd JayXon 🇺🇸 893 150 8 Sep 2023 724th Shanethegamer 🇺🇸 892 61 31 Oct 2022 724th MeWhenI 🇻🇦 892 61 4 Nov 2022 726th oeb25 892 93 16 May 2022 726th snobee 🇨🇦 892 93 8 Dec 2022 726th logvp 892 93 2 Jan 2024 726th elgan65536 892 93 5 Mar 2024 726th smartiel 892 93 12 Aug 2024 726th trist224 🇫🇷 892 93 12 Aug 2024 726th nullie 892 93 19 Dec 2024 726th lolgeny 892 93 22 Feb 2025 734th Steffan153 🇫🇮 891 52 31 Dec 2022 735th KatieLG 🇬🇧 891 60 4 May 2022 735th ScottHamper 891 60 5 May 2022 735th Re-Adventures 🇮🇳 891 60 5 May 2022 735th 0x24a537r9 891 60 29 Jul 2022 735th stefangabos 🇷🇴 891 60 19 Aug 2022 735th eranws 891 60 10 Sep 2022 735th GeorgeStechman 🇬🇧 891 60 26 Sep 2022 735th BloodStormKnight 891 60 15 Oct 2022 735th dzshn 891 60 3 Dec 2022 735th biocommando 🇫🇮 891 60 20 Dec 2022 735th Betuaredead 891 60 5 Jan 2023 735th piano-miles 891 60 16 Jan 2023 735th Yewzir 🇧🇪 891 60 12 Feb 2023 735th shellbertt 🇨🇦 891 60 26 Feb 2023 735th zakariamouhid 891 60 20 May 2023 735th raphaelimahorn 891 60 23 Aug 2023 Prev 676–750 of 3,164 Next