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 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 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 Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers 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 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 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 Minesweeper NFA Simulator Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial # Golfer Points Bytes Time 376th ovs-code 🇩🇪 925 67 13 Dec 2022 376th Steffan153 🇫🇮 925 67 18 Dec 2022 376th Lydxn 🇨🇦 925 67 4 Feb 2023 376th sean-niemann 🇺🇸 925 67 7 Mar 2025 380th Bubbler-4 923 33 6 May 2022 380th rak1507 🇬🇧 923 33 8 May 2022 380th ngn 🇧🇬 923 33 11 May 2022 380th zacjl 923 33 3 Jun 2025 380th GrayJoKing 🇦🇺 923 33 4 Jun 2025 385th edsrzf 🇳🇿 923 54 13 Sep 2025 385th CaedenHarper 🇨🇦 923 54 23 days ago 385th sean-niemann 🇺🇸 923 54 23 days ago 388th btnlq 923 59 6 Nov 2022 389th Lydxn 🇨🇦 923 90 6 May 2022 390th nwellnhof 🇩🇪 922 51 4 May 2022 390th primo-ppcg 🇹🇭 922 51 6 May 2022 390th janlelis 922 51 10 May 2022 390th Natanaelel 🇸🇪 922 51 2 Jun 2022 394th uiamn 922 58 6 Sep 2022 394th 5quiwyrm 922 58 29 Sep 2022 394th alasdair-greenland 922 58 13 Jan 2023 394th kirjavascript 922 58 4 Aug 2025 394th Posandu 922 58 26 Aug 2025 394th mrxz 🇳🇱 922 58 3 Sep 2025 400th MichalMarsalek 🇨🇿 921 71 5 May 2022 400th Lydxn 🇨🇦 921 71 7 May 2022 400th GrayJoKing 🇦🇺 921 71 8 May 2022 400th JayXon 🇺🇸 921 71 8 May 2022 400th Steffan153 🇫🇮 921 71 9 Mar 2023 400th Shanethegamer 🇺🇸 921 71 15 May 2023 400th MeWhenI 🇻🇦 921 71 8 Aug 2023 400th sean-niemann 🇺🇸 921 71 9 Jan 2025 408th Steffan153 🇫🇮 921 76 15 May 2023 408th primo-ppcg 🇹🇭 921 76 15 May 2023 408th Lydxn 🇨🇦 921 76 22 May 2023 408th GrayJoKing 🇦🇺 921 76 24 Aug 2023 412th Herbert00709 🇵🇱 921 92 17 Nov 2023 412th 4QT0R 921 92 23 Nov 2023 412th ovs-code 🇩🇪 921 92 3 Jun 2024 415th xnor-gate 919 63 20 Jan 2025 416th Lydxn 🇨🇦 918 70 7 May 2022 416th JayXon 🇺🇸 918 70 7 May 2022 418th pardouin 🇫🇷 918 72 21 May 2025 419th primo-ppcg 🇹🇭 917 61 6 May 2022 419th sisyphus-ppcg 🇦🇺 917 61 14 Jul 2022 421st Steffan153 🇫🇮 917 71 14 Oct 2022 421st Shanethegamer 🇺🇸 917 71 15 Oct 2022 421st stefangimmillaro 917 71 16 Oct 2022 421st MeWhenI 🇻🇦 917 71 16 Oct 2022 425th annaproxy 917 79 24 Aug 2022 425th GrayJoKing 🇦🇺 917 79 28 Aug 2022 425th IanUtley 917 79 3 Nov 2023 425th Kacarott 🇦🇺 917 79 13 Jun 2024 429th Steffan153 🇫🇮 916 71 10 Dec 2022 429th synt7x 🇺🇸 916 71 7 Jul 2025 431st JayXon 🇺🇸 916 79 5 Apr 2023 431st Lydxn 🇨🇦 916 79 9 Apr 2023 433rd Steffan153 🇫🇮 916 81 11 Dec 2023 434th arctouch-cristiannevianna 916 85 3 Apr 2023 434th tomtheisen 🇺🇸 916 85 10 Apr 2025 436th Natanaelel 🇸🇪 915 57 17 Jan 2024 436th Kacarott 🇦🇺 915 57 10 Sep 2024 438th Shanethegamer 🇺🇸 915 61 9 Oct 2023 438th edsrzf 🇳🇿 915 61 4 Jul 2025 440th Shanethegamer 🇺🇸 915 87 15 May 2023 440th JayXon 🇺🇸 915 87 15 May 2023 440th Steffan153 🇫🇮 915 87 16 May 2023 440th Lydxn 🇨🇦 915 87 16 May 2023 440th GrayJoKing 🇦🇺 915 87 11 Aug 2023 440th sean-niemann 🇺🇸 915 87 11 Jul 2024 446th ovs-code 🇩🇪 914 75 12 Sep 2024 446th Kacarott 🇦🇺 914 75 13 Sep 2024 448th Lydxn 🇨🇦 914 81 1 Apr 2023 449th AdamHe17 913 73 31 May 2022 449th AliceFord 913 73 2 Jun 2022 First Prev 376–450 of 3,405 Next Last