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 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 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 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 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 Trinomial Triangle Turtle Tutorial # Golfer Points Bytes Time 359th tobeannouncd 926 72 25 Apr 2025 359th YAJUE114514 926 72 15 Aug 2025 378th ovs-code 🇩🇪 925 67 13 Dec 2022 378th Steffan153 🇫🇮 925 67 18 Dec 2022 378th Lydxn 🇨🇦 925 67 4 Feb 2023 378th sean-niemann 🇺🇸 925 67 7 Mar 2025 382nd Lydxn 🇨🇦 924 108 6 May 2022 382nd JayXon 🇺🇸 924 108 9 May 2022 384th Luca2812 924 127 12 Dec 2022 384th h3ra993huskp 🇯🇵 924 127 17 Sep 2023 384th tigerdan2 🇩🇪 924 127 19 Dec 2023 384th Apataras 924 127 16 Jul 2025 388th Bubbler-4 923 33 6 May 2022 388th rak1507 🇬🇧 923 33 8 May 2022 388th ngn 🇧🇬 923 33 11 May 2022 388th zacjl 923 33 3 Jun 2025 388th GrayJoKing 🇦🇺 923 33 4 Jun 2025 393rd Lydxn 🇨🇦 923 90 6 May 2022 393rd kumavale 923 90 20 days ago 395th nwellnhof 🇩🇪 922 51 4 May 2022 395th primo-ppcg 🇹🇭 922 51 6 May 2022 395th janlelis 922 51 10 May 2022 395th Natanaelel 🇸🇪 922 51 2 Jun 2022 399th uiamn 922 58 6 Sep 2022 399th 5quiwyrm 922 58 29 Sep 2022 399th alasdair-greenland 922 58 13 Jan 2023 399th kirjavascript 922 58 4 Aug 2025 399th Posandu 922 58 26 Aug 2025 399th mrxz 🇳🇱 922 58 20 days ago 405th btnlq 922 59 6 Nov 2022 406th MichalMarsalek 🇨🇿 921 71 5 May 2022 406th Lydxn 🇨🇦 921 71 7 May 2022 406th GrayJoKing 🇦🇺 921 71 8 May 2022 406th JayXon 🇺🇸 921 71 8 May 2022 406th Steffan153 🇫🇮 921 71 9 Mar 2023 406th Shanethegamer 🇺🇸 921 71 15 May 2023 406th MeWhenI 🇻🇦 921 71 8 Aug 2023 406th sean-niemann 🇺🇸 921 71 9 Jan 2025 414th Herbert00709 🇵🇱 921 92 17 Nov 2023 414th 4QT0R 921 92 23 Nov 2023 414th ovs-code 🇩🇪 921 92 3 Jun 2024 417th edsrzf 🇳🇿 920 54 10 days ago 418th Steffan153 🇫🇮 920 76 15 May 2023 418th primo-ppcg 🇹🇭 920 76 15 May 2023 418th Lydxn 🇨🇦 920 76 22 May 2023 418th GrayJoKing 🇦🇺 920 76 24 Aug 2023 422nd xnor-gate 919 63 20 Jan 2025 423rd primo-ppcg 🇹🇭 917 61 6 May 2022 423rd sisyphus-ppcg 🇦🇺 917 61 14 Jul 2022 425th Lydxn 🇨🇦 917 70 7 May 2022 425th JayXon 🇺🇸 917 70 7 May 2022 427th Steffan153 🇫🇮 916 71 14 Oct 2022 427th Shanethegamer 🇺🇸 916 71 15 Oct 2022 427th stefangimmillaro 916 71 16 Oct 2022 427th MeWhenI 🇻🇦 916 71 16 Oct 2022 427th Steffan153 🇫🇮 916 71 10 Dec 2022 427th synt7x 🇺🇸 916 71 7 Jul 2025 433rd annaproxy 916 79 24 Aug 2022 433rd GrayJoKing 🇦🇺 916 79 28 Aug 2022 433rd IanUtley 916 79 3 Nov 2023 433rd Kacarott 🇦🇺 916 79 13 Jun 2024 437th arctouch-cristiannevianna 916 85 3 Apr 2023 437th tomtheisen 🇺🇸 916 85 10 Apr 2025 439th sean-niemann 🇺🇸 916 109 25 May 2024 439th CaedenHarper 🇨🇦 916 109 28 Jan 2025 439th GolfingSuccess 🇬🇷 916 109 17 days ago 442nd Shanethegamer 🇺🇸 915 61 9 Oct 2023 442nd edsrzf 🇳🇿 915 61 4 Jul 2025 444th JayXon 🇺🇸 915 79 5 Apr 2023 444th Lydxn 🇨🇦 915 79 9 Apr 2023 446th Natanaelel 🇸🇪 914 57 17 Jan 2024 446th Kacarott 🇦🇺 914 57 10 Sep 2024 448th pardouin 🇫🇷 914 72 21 May 2025 449th Steffan153 🇫🇮 914 81 11 Dec 2023 450th Shanethegamer 🇺🇸 914 87 15 May 2023 Prev 376–450 of 3,331 Next