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Collatz in all languages in chars. 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 Chars Time Submitted 373rd CLOStrophobic 🇮🇹 905 93 31ms 17 Jan 2025 373rd edsrzf 🇳🇿 905 93 30ms 3 Jul 2025 378th Lydxn 🇨🇦 905 107 260ms 6 May 2022 378th CaedenHarper 🇨🇦 905 107 256ms 5 Oct 2025 380th KrausRaus 🇺🇸 903 59 9ms 4 May 2022 380th voytxt 🇨🇿 903 59 9ms 4 May 2022 380th KingSkyrock 🇺🇸 903 59 10ms 18 May 2022 380th ZakkkkAttackkkk 🇵🇭 903 59 11ms 14 Jul 2022 380th aksyristos 903 59 10ms 28 Oct 2022 380th nstearns96 🇬🇧 903 59 9ms 28 Nov 2022 380th janbehrens 🇩🇪 903 59 10ms 17 May 2023 380th Shanethegamer 🇺🇸 903 59 10ms 25 May 2023 380th Maznek 903 59 9ms 26 Jun 2023 380th SpiritAxolotl 🇺🇸 903 59 10ms 20 Mar 2024 380th Andrey-Plotnikov 903 59 9ms 19 May 2024 380th emgordon154 903 59 9ms 5 Aug 2024 380th duckyluuk 🇳🇱 903 59 9ms 3 Oct 2024 380th lifthrasiir 🇰🇷 903 59 9ms 23 Nov 2024 380th fuzzylojik-golf 🇺🇸 903 59 11ms 1 Jun 2025 380th acollett89 903 59 10ms 17 Jun 2025 380th iczelia 🇩🇪 903 59 11ms 23 Sep 2025 397th GrayJoKing 🇦🇺 903 71 289ms 10 Aug 2023 398th Shanethegamer 🇺🇸 903 77 12ms 15 May 2023 399th marshallward 🇺🇸 903 83 46ms 10 May 2022 400th edsrzf 🇳🇿 902 72 127ms 3 Jul 2025 401st edsrzf 🇳🇿 902 83 41ms 14 Jan 2025 401st kg583 🇺🇸 902 83 39ms 14 Feb 2025 403rd krcs 🇵🇱 902 86 309ms 10 May 2022 403rd billings7 🇬🇧 902 86 328ms 15 May 2022 403rd revlayle 🇺🇸 902 86 330ms 7 Dec 2022 403rd albanian-laundromat 902 86 362ms 30 Sep 2025 407th m-tkach 🇺🇦 902 90 31ms 7 Dec 2023 408th Betuaredead 901 60 6ms 5 Jan 2023 408th Yewzir 🇧🇪 901 60 5ms 12 Feb 2023 408th Steffan153 🇫🇮 901 60 5ms 23 Feb 2023 408th DialFrost 🇸🇬 901 60 5ms 30 Jul 2024 408th GolfingSuccess 🇬🇷 901 60 5ms 16 Oct 2024 408th sean-niemann 🇺🇸 901 60 12ms 7 Mar 2025 414th shellbertt 🇨🇦 901 62 19ms 4 May 2022 414th ZakkkkAttackkkk 🇵🇭 901 62 20ms 5 May 2022 414th annaproxy 901 62 19ms 8 Jun 2022 414th bob-th 901 62 19ms 9 Jul 2022 414th btjones0 901 62 24ms 15 Jul 2022 414th tri1212 🇻🇳 901 62 19ms 18 Jul 2022 414th fredrik-bakke 🇳🇴 901 62 21ms 5 Oct 2022 414th jakobkordez 🇸🇮 901 62 19ms 19 Oct 2022 414th Fishron 901 62 20ms 29 Nov 2022 414th KatieLG 🇬🇧 901 62 21ms 11 Dec 2022 414th ItsMeNoobieboy 901 62 21ms 20 Dec 2022 414th firegene 🇮🇪 901 62 21ms 3 Jan 2023 414th ljweel 901 62 19ms 13 Feb 2023 414th 2011-Chan-Ethan 901 62 22ms 9 Jul 2023 414th elgan65536 901 62 19ms 18 Nov 2023 414th Dataen 901 62 20ms 16 Jan 2024 414th Yewzir 🇧🇪 901 62 54ms 5 Apr 2024 414th cuboids 901 62 20ms 11 Jul 2024 414th wuzekai518 901 62 23ms 26 Jul 2024 414th abhishekg999 901 62 51ms 17 Sep 2024 414th lifthrasiir 🇰🇷 901 62 18ms 16 Nov 2024 414th Artemis21 🇬🇧 901 62 19ms 17 Jan 2025 414th lolgeny 901 62 20ms 22 Feb 2025 414th keelimeguy 🇺🇸 901 62 19ms 15 May 2025 414th Flekay 🇩🇪 901 62 20ms 19 Jun 2025 414th DoubleUynn 901 62 19ms 25 Jun 2025 414th JOrE20 🇺🇸 901 62 19ms 8 days ago 441st GolfingSuccess 🇬🇷 901 64 86ms 14 Dec 2024 441st MeWhenI 🇻🇦 901 64 92ms 24 Dec 2024 441st GrayJoKing 🇦🇺 901 64 86ms 5 days ago 444th kg583 🇺🇸 901 79 18ms 30 Jul 2025 445th Lydxn 🇨🇦 900 64 199ms 1 Apr 2023 446th DialFrost 🇸🇬 900 76 198ms 3 Aug 2025 447th Kacarott 🇦🇺 900 79 135ms 13 Jun 2024 448th stefangimmillaro 900 92 131ms 24 Oct 2023 448th inverseLorentz 🇦🇺 900 92 124ms 27 May 2024 448th sean-niemann 🇺🇸 900 92 124ms 8 Jun 2025 First Prev 376–450 of 3,471 Next Last