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 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 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 363rd Glinte 926 72 35ms 11 Dec 2023 363rd nanatsu8 926 72 26ms 11 May 2024 363rd thej10n 926 72 23ms 12 Jun 2024 363rd duckyluuk 🇳🇱 926 72 21ms 13 Jun 2024 363rd tobeannouncd 926 72 22ms 25 Apr 2025 363rd YAJUE114514 926 72 17ms 15 Aug 2025 363rd blaztoma 🇱🇹 926 72 39ms 26 Sep 2025 383rd JayXon 🇺🇸 926 105 248ms 4 Oct 2025 383rd KasperKivimaeki 🇫🇮 926 105 243ms 4 Oct 2025 385th ovs-code 🇩🇪 925 67 92ms 13 Dec 2022 385th Steffan153 🇫🇮 925 67 99ms 18 Dec 2022 385th Lydxn 🇨🇦 925 67 105ms 4 Feb 2023 385th sean-niemann 🇺🇸 925 67 107ms 7 Mar 2025 389th Bubbler-4 923 33 2,581ms 6 May 2022 389th rak1507 🇬🇧 923 33 113ms 8 May 2022 389th ngn 🇧🇬 923 33 26ms 11 May 2022 389th zacjl 923 33 32ms 3 Jun 2025 389th GrayJoKing 🇦🇺 923 33 14ms 4 Jun 2025 394th edsrzf 🇳🇿 923 54 796ms 13 Sep 2025 394th CaedenHarper 🇨🇦 923 54 817ms 27 Sep 2025 394th sean-niemann 🇺🇸 923 54 818ms 27 Sep 2025 397th btnlq 923 59 8ms 6 Nov 2022 398th Lydxn 🇨🇦 923 90 124ms 6 May 2022 399th nwellnhof 🇩🇪 922 51 50ms 4 May 2022 399th primo-ppcg 🇹🇭 922 51 43ms 6 May 2022 399th janlelis 922 51 39ms 10 May 2022 399th Natanaelel 🇸🇪 922 51 39ms 2 Jun 2022 403rd uiamn 922 58 11ms 6 Sep 2022 403rd 5quiwyrm 922 58 11ms 29 Sep 2022 403rd alasdair-greenland 922 58 10ms 13 Jan 2023 403rd kirjavascript 922 58 11ms 4 Aug 2025 403rd Posandu 922 58 13ms 26 Aug 2025 403rd mrxz 🇳🇱 922 58 10ms 3 Sep 2025 409th Herbert00709 🇵🇱 922 92 55ms 17 Nov 2023 409th 4QT0R 922 92 62ms 23 Nov 2023 409th ovs-code 🇩🇪 922 92 56ms 3 Jun 2024 412th MichalMarsalek 🇨🇿 921 71 122ms 5 May 2022 412th Lydxn 🇨🇦 921 71 126ms 7 May 2022 412th GrayJoKing 🇦🇺 921 71 129ms 8 May 2022 412th JayXon 🇺🇸 921 71 137ms 8 May 2022 412th Steffan153 🇫🇮 921 71 120ms 9 Mar 2023 412th Shanethegamer 🇺🇸 921 71 128ms 15 May 2023 412th MeWhenI 🇻🇦 921 71 121ms 8 Aug 2023 412th sean-niemann 🇺🇸 921 71 126ms 9 Jan 2025 420th Steffan153 🇫🇮 921 76 12ms 15 May 2023 420th primo-ppcg 🇹🇭 921 76 23ms 15 May 2023 420th Lydxn 🇨🇦 921 76 8ms 22 May 2023 420th GrayJoKing 🇦🇺 921 76 12ms 24 Aug 2023 424th xnor-gate 919 63 194ms 20 Jan 2025 425th Lydxn 🇨🇦 918 70 96ms 7 May 2022 425th JayXon 🇺🇸 918 70 96ms 7 May 2022 427th pardouin 🇫🇷 918 72 3,105ms 21 May 2025 428th primo-ppcg 🇹🇭 917 61 6ms 6 May 2022 428th sisyphus-ppcg 🇦🇺 917 61 9ms 14 Jul 2022 430th Steffan153 🇫🇮 917 71 117ms 14 Oct 2022 430th Shanethegamer 🇺🇸 917 71 107ms 15 Oct 2022 430th stefangimmillaro 917 71 111ms 16 Oct 2022 430th MeWhenI 🇻🇦 917 71 115ms 16 Oct 2022 434th annaproxy 917 79 128ms 24 Aug 2022 434th GrayJoKing 🇦🇺 917 79 89ms 28 Aug 2022 434th IanUtley 917 79 119ms 3 Nov 2023 434th Kacarott 🇦🇺 917 79 135ms 13 Jun 2024 438th Steffan153 🇫🇮 916 71 6ms 10 Dec 2022 438th synt7x 🇺🇸 916 71 4ms 7 Jul 2025 440th JayXon 🇺🇸 916 79 784ms 5 Apr 2023 440th Lydxn 🇨🇦 916 79 810ms 9 Apr 2023 442nd Steffan153 🇫🇮 916 81 26ms 11 Dec 2023 443rd arctouch-cristiannevianna 916 85 366ms 3 Apr 2023 443rd tomtheisen 🇺🇸 916 85 340ms 10 Apr 2025 445th Natanaelel 🇸🇪 915 57 474ms 17 Jan 2024 445th Kacarott 🇦🇺 915 57 425ms 10 Sep 2024 447th Shanethegamer 🇺🇸 915 61 5ms 9 Oct 2023 447th edsrzf 🇳🇿 915 61 4ms 4 Jul 2025 449th Shanethegamer 🇺🇸 915 87 390ms 15 May 2023 449th JayXon 🇺🇸 915 87 508ms 15 May 2023 First Prev 376–450 of 3,434 Next Last