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Collatz in all languages in bytes. Achievements Cheevos Holes Languages Medals Miscellaneous 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 Taxicab 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 Erlang 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 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 Erlang 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 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 Taxicab Numbers Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 221st JayXon 🇺🇸 930 60 4ms 29 Jan 2024 221st rucin93 🇵🇱 930 60 5ms 10 Jul 2024 221st sean-niemann 🇺🇸 930 60 4ms 10 Jul 2024 229th Lydxn 🇨🇦 930 70 116ms 17 Oct 2022 229th JayXon 🇺🇸 930 70 107ms 17 Oct 2022 229th GrayJoKing 🇦🇺 930 70 3ms 13 Jul 2024 229th FlyingPenguin223 930 70 4ms 4 Oct 2024 229th jipsong 🇩🇪 930 70 6ms 5 Apr 2025 234th Natanaelel 🇸🇪 929 28 193ms 22 Jul 2022 234th SirBogman 🇺🇸 929 28 175ms 17 Sep 2022 236th Steffan153 🇫🇮 929 67 37ms 19 Aug 2024 236th JayXon 🇺🇸 929 67 53ms 19 Aug 2024 238th sisyphus-ppcg 🇦🇺 928 50 2,856ms 31 Jan 2023 238th saito-ta 🇯🇵 928 50 890ms 12 Dec 2024 240th JayXon 🇺🇸 928 57 136ms 19 Aug 2024 241st roavin 927 84 316ms 23 Jun 2022 241st tkr-sh 🇰🇵 927 84 313ms 20 Aug 2022 241st Nickmiste 927 84 321ms 9 Nov 2022 241st Matgc04 927 84 319ms 19 May 2023 241st postie77 927 84 319ms 19 May 2023 241st ertz1ertz 927 84 317ms 13 Sep 2024 241st Grabnukebomb 927 84 314ms 13 Sep 2024 241st Shanethegamer 🇺🇸 927 84 341ms 9 Apr 2025 241st HumanoidCPU 927 84 344ms 10 Apr 2025 241st annaproxy 927 84 332ms 11 Apr 2025 241st Re-Adventures 🇮🇳 927 84 324ms 15 Apr 2025 241st janbehrens 🇩🇪 927 84 349ms 17 Apr 2025 241st Flix7dev 🇧🇪 927 84 341ms 21 Oct 2025 254th h3ra993huskp 🇯🇵 926 90 342ms 19 hours ago 255th JayXon 🇺🇸 926 105 248ms 4 Oct 2025 255th KasperKivimaeki 🇫🇮 926 105 243ms 4 Oct 2025 257th edsrzf 🇳🇿 925 54 796ms 13 Sep 2025 257th CaedenHarper 🇨🇦 925 54 817ms 27 Sep 2025 257th sean-niemann 🇺🇸 925 54 818ms 27 Sep 2025 257th albanian-laundromat 925 54 859ms 16 days ago 257th xsot 🇸🇬 925 54 811ms 15 days ago 262nd ovs-code 🇩🇪 925 67 92ms 13 Dec 2022 262nd Steffan153 🇫🇮 925 67 99ms 18 Dec 2022 262nd Lydxn 🇨🇦 925 67 105ms 4 Feb 2023 262nd sean-niemann 🇺🇸 925 67 105ms 7 Mar 2025 266th Lydxn 🇨🇦 924 90 124ms 6 May 2022 267th Bubbler-4 923 33 2,611ms 6 May 2022 267th rak1507 🇬🇧 923 33 112ms 8 May 2022 267th ngn 🇧🇬 923 33 25ms 11 May 2022 267th zacjl 923 33 33ms 3 Jun 2025 267th GrayJoKing 🇦🇺 923 33 15ms 4 Jun 2025 267th HPWiz 🇳🇿 923 33 9ms 14 days ago 273rd nwellnhof 🇩🇪 923 51 50ms 4 May 2022 273rd primo-ppcg 🇹🇭 923 51 43ms 6 May 2022 273rd janlelis 923 51 39ms 10 May 2022 273rd Natanaelel 🇸🇪 923 51 39ms 2 Jun 2022 277th uiamn 923 58 11ms 6 Sep 2022 277th 5quiwyrm 923 58 10ms 29 Sep 2022 277th alasdair-greenland 923 58 10ms 13 Jan 2023 277th kirjavascript 923 58 10ms 4 Aug 2025 277th Posandu 923 58 10ms 26 Aug 2025 277th mrxz 🇳🇱 923 58 13ms 3 Sep 2025 283rd btnlq 923 59 8ms 6 Nov 2022 284th MichalMarsalek 🇨🇿 922 71 122ms 5 May 2022 284th Lydxn 🇨🇦 922 71 126ms 7 May 2022 284th GrayJoKing 🇦🇺 922 71 123ms 8 May 2022 284th JayXon 🇺🇸 922 71 124ms 8 May 2022 284th Steffan153 🇫🇮 922 71 120ms 9 Mar 2023 284th Shanethegamer 🇺🇸 922 71 128ms 15 May 2023 284th MeWhenI 🇻🇦 922 71 121ms 8 Aug 2023 284th sean-niemann 🇺🇸 922 71 122ms 9 Jan 2025 292nd Steffan153 🇫🇮 922 76 11ms 15 May 2023 292nd primo-ppcg 🇹🇭 922 76 18ms 15 May 2023 292nd Lydxn 🇨🇦 922 76 8ms 22 May 2023 292nd GrayJoKing 🇦🇺 922 76 12ms 24 Aug 2023 296th Herbert00709 🇵🇱 922 92 55ms 17 Nov 2023 296th 4QT0R 922 92 55ms 23 Nov 2023 296th ovs-code 🇩🇪 922 92 50ms 3 Jun 2024 299th xnor-gate 920 63 194ms 20 Jan 2025 300th pardouin 🇫🇷 919 72 3,105ms 21 May 2025 First Prev 226–300 of 3,495 Next Last