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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 225th kg583 🇺🇸 926 52 461ms 24 Jan 2024 225th Shanethegamer 🇺🇸 926 52 446ms 24 Mar 2024 225th pardouin 🇫🇷 926 52 487ms 11 Jul 2024 225th Steffan153 🇫🇮 926 52 496ms 17 Aug 2024 225th sean-niemann 🇺🇸 926 52 502ms 24 Jan 2025 231st MeWhenI 🇻🇦 925 68 88ms 23 Feb 2023 231st JayXon 🇺🇸 925 68 89ms 4 Mar 2025 233rd GrayJoKing 🇦🇺 925 70 3ms 13 Jul 2024 233rd FlyingPenguin223 925 70 4ms 4 Oct 2024 233rd jipsong 🇩🇪 925 70 6ms 5 Apr 2025 236th Lydxn 🇨🇦 924 70 116ms 17 Oct 2022 236th JayXon 🇺🇸 924 70 107ms 17 Oct 2022 238th roavin 924 84 316ms 23 Jun 2022 238th tkr-sh 🇰🇵 924 84 313ms 20 Aug 2022 238th Nickmiste 924 84 321ms 9 Nov 2022 238th postie77 924 84 319ms 19 May 2023 238th ertz1ertz 924 84 317ms 13 Sep 2024 238th Grabnukebomb 924 84 314ms 13 Sep 2024 238th Shanethegamer 🇺🇸 924 84 341ms 9 Apr 2025 238th HumanoidCPU 924 84 344ms 10 Apr 2025 238th annaproxy 924 84 332ms 11 Apr 2025 238th Re-Adventures 🇮🇳 924 84 324ms 15 Apr 2025 238th janbehrens 🇩🇪 924 84 349ms 17 Apr 2025 249th sean-niemann 🇺🇸 923 54 125ms 6 Aug 2024 249th Steffan153 🇫🇮 923 54 119ms 6 Aug 2024 249th lukegustafson 🇺🇸 923 54 123ms 7 Aug 2024 249th pardouin 🇫🇷 923 54 123ms 8 Aug 2024 249th Lydxn 🇨🇦 923 54 126ms 9 Aug 2024 249th JayXon 🇺🇸 923 54 127ms 9 Aug 2024 255th h3ra993huskp 🇯🇵 923 90 342ms 13 hours ago 256th JayXon 🇺🇸 923 105 248ms 4 Oct 2025 256th KasperKivimaeki 🇫🇮 923 105 243ms 4 Oct 2025 258th ovs-code 🇩🇪 922 60 4ms 9 Oct 2023 258th GrayJoKing 🇦🇺 922 60 5ms 11 Oct 2023 258th Lydxn 🇨🇦 922 60 4ms 11 Oct 2023 258th GolfingSuccess 🇬🇷 922 60 4ms 16 Nov 2023 258th Steffan153 🇫🇮 922 60 5ms 28 Jan 2024 258th JayXon 🇺🇸 922 60 4ms 29 Jan 2024 258th rucin93 🇵🇱 922 60 5ms 10 Jul 2024 258th sean-niemann 🇺🇸 922 60 4ms 10 Jul 2024 266th Steffan153 🇫🇮 922 67 37ms 19 Aug 2024 266th JayXon 🇺🇸 922 67 53ms 19 Aug 2024 268th Lydxn 🇨🇦 920 90 124ms 6 May 2022 269th sisyphus-ppcg 🇦🇺 919 50 2,856ms 31 Jan 2023 269th saito-ta 🇯🇵 919 50 890ms 12 Dec 2024 271st uiamn 919 58 11ms 6 Sep 2022 271st 5quiwyrm 919 58 10ms 29 Sep 2022 271st alasdair-greenland 919 58 10ms 13 Jan 2023 271st kirjavascript 919 58 10ms 4 Aug 2025 271st Posandu 919 58 10ms 26 Aug 2025 271st mrxz 🇳🇱 919 58 13ms 3 Sep 2025 277th sean-niemann 🇺🇸 919 66 100ms 29 May 2025 278th Herbert00709 🇵🇱 919 92 55ms 17 Nov 2023 278th 4QT0R 919 92 55ms 23 Nov 2023 278th ovs-code 🇩🇪 919 92 50ms 3 Jun 2024 281st primo-ppcg 🇹🇭 917 24 158ms 10 Dec 2022 282nd JayXon 🇺🇸 917 69 531ms 5 Apr 2023 282nd Lydxn 🇨🇦 917 69 548ms 9 Apr 2023 284th nwellnhof 🇩🇪 916 51 50ms 4 May 2022 284th primo-ppcg 🇹🇭 916 51 43ms 6 May 2022 284th janlelis 916 51 39ms 10 May 2022 284th Natanaelel 🇸🇪 916 51 39ms 2 Jun 2022 288th btnlq 916 59 8ms 6 Nov 2022 289th Irratix 🇳🇱 916 61 45ms 7 May 2022 289th TFeld00 🇩🇰 916 61 28ms 17 May 2022 289th hallvabo 🇳🇴 916 61 19ms 4 Sep 2022 289th DialFrost 🇸🇬 916 61 24ms 19 Dec 2022 289th anter69 🇭🇺 916 61 20ms 19 Dec 2022 289th Alex-x90 🇺🇸 916 61 23ms 27 Dec 2022 289th commandblockguy 🇺🇸 916 61 18ms 22 Aug 2023 289th fgrosshans 🇫🇷 916 61 19ms 22 Jul 2024 289th duckyluuk 🇳🇱 916 61 20ms 15 Aug 2024 289th rucin93 🇵🇱 916 61 17ms 31 May 2025 289th katss2 916 61 19ms 17 Aug 2025 300th MichalMarsalek 🇨🇿 915 71 122ms 5 May 2022 First Prev 226–300 of 3,469 Next Last