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 Tower of Hanoi 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 Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers 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 Tower of Hanoi 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 Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 505th xyangst 888 60 10ms 28 Sep 2024 505th a6166231 🇨🇳 888 60 9ms 15 May 2025 505th Protothor 888 60 10ms 8 Jul 2025 505th SebassNoob 888 60 10ms 5 Aug 2025 505th Yax42 🇫🇷 888 60 10ms 5 Sep 2025 505th levinwinter 888 60 10ms 22 Oct 2025 505th Cube14yt 888 60 10ms 26 days ago 505th gigaprofisi 🇺🇸 888 60 10ms 24 days ago 534th Lydxn 🇨🇦 888 107 263ms 6 May 2022 534th CaedenHarper 🇨🇦 888 107 308ms 5 Oct 2025 536th P-Quentin 🇫🇷 887 63 18ms 3 Aug 2022 536th kaptsanovb 887 63 28ms 20 Apr 2023 536th fkantelberg 887 63 20ms 14 Jul 2023 536th VictorStenvers 🇳🇱 887 63 22ms 13 Nov 2023 536th 1231234md5 🇨🇳 887 63 18ms 14 Dec 2023 536th f-tucker 887 63 23ms 6 Feb 2024 536th JunkIce 887 63 23ms 24 Nov 2024 536th Kowalskiexe 🇵🇱 887 63 19ms 19 Apr 2025 536th 123mjb 887 63 23ms 2 Jun 2025 536th DrakeSeteraO 887 63 52ms 24 Oct 2025 546th RockOfStone 887 73 4ms 20 Oct 2025 547th JayXon 🇺🇸 887 74 2,888ms 14 Nov 2024 548th jared-hughes 887 130 23ms 15 Dec 2024 549th canissimia 🇦🇶 887 204 16ms 25 Nov 2023 550th Shanethegamer 🇺🇸 886 61 5ms 31 Oct 2022 550th MeWhenI 🇻🇦 886 61 5ms 4 Nov 2022 552nd lynn 886 65 283ms 5 May 2022 552nd GrayJoKing 🇦🇺 886 65 250ms 5 May 2022 552nd Sakisan 🇧🇪 886 65 178ms 6 May 2022 552nd JayXon 🇺🇸 886 65 311ms 17 Oct 2022 552nd Steffan153 🇫🇮 886 65 185ms 12 Nov 2022 552nd tobeannouncd 886 65 312ms 25 Apr 2025 552nd sean-niemann 🇺🇸 886 65 168ms 9 Jun 2025 559th stefangimmillaro 886 71 87ms 2 Oct 2022 559th Steffan153 🇫🇮 886 71 94ms 23 Feb 2023 559th Shanethegamer 🇺🇸 886 71 90ms 16 May 2023 559th sean-niemann 🇺🇸 886 71 86ms 12 Jul 2024 563rd Shanethegamer 🇺🇸 886 72 90ms 8 May 2025 563rd edsrzf 🇳🇿 886 72 103ms 4 Jul 2025 563rd Yewzir 🇧🇪 886 72 92ms 21 days ago 566th DialFrost 🇸🇬 886 95 29ms 10 Dec 2024 567th canissimia 🇦🇶 886 110 2,640ms 20 Feb 2023 568th GrayJoKing 🇦🇺 885 77 96ms 13 Sep 2024 569th Steffan153 🇫🇮 884 52 7ms 31 Dec 2022 570th albanian-laundromat 884 94 415ms 24 Sep 2025 570th jkelly467 884 94 544ms 23 Oct 2025 570th HumanoidCPU 884 94 397ms 8 Nov 2025 573rd DialFrost 🇸🇬 883 76 81ms 17 Mar 2025 574th stefangimmillaro 882 53 35ms 2 Oct 2022 574th Haksell 🇦🇶 882 53 36ms 22 Feb 2023 576th GrayJoKing 🇦🇺 882 70 3ms 6 May 2022 576th ovs-code 🇩🇪 882 70 2ms 8 Oct 2023 576th 09cf 882 70 2ms 8 Oct 2023 576th saito-ta 🇯🇵 882 70 2ms 21 Dec 2023 576th sean-niemann 🇺🇸 882 70 2ms 10 Jul 2024 576th KasperKivimaeki 🇫🇮 882 70 6ms 8 Aug 2025 582nd primo-ppcg 🇹🇭 882 85 39ms 14 Jan 2025 582nd MeWhenI 🇻🇦 882 85 41ms 21 Apr 2025 584th SiestaGuru 882 88 326ms 9 Jan 2023 584th rifatx 882 88 322ms 5 Jul 2024 584th kmathis22 882 88 367ms 25 Sep 2025 584th arcpolaris 882 88 391ms 8 Nov 2025 588th primo-ppcg 🇹🇭 881 52 211ms 5 May 2022 588th dvargas46 🇺🇸 881 52 85ms 22 Dec 2022 590th DialFrost 🇸🇬 881 56 863ms 1 Sep 2025 591st ovs-code 🇩🇪 881 89 438ms 24 Jul 2024 591st jipsong 🇩🇪 881 89 467ms 7 Apr 2025 593rd nipzu 881 94 116ms 17 May 2022 593rd Natanaelel 🇸🇪 881 94 125ms 17 Jun 2022 593rd nkoppel 881 94 120ms 19 Oct 2022 593rd ovs-code 🇩🇪 881 94 120ms 21 Jun 2023 593rd mousetail 🇳🇱 881 94 124ms 12 Jan 2024 598th Irratix 🇳🇱 881 96 53ms 4 May 2022 598th MeWhenI 🇻🇦 881 96 52ms 1 Jun 2022 598th janbehrens 🇩🇪 881 96 57ms 21 Apr 2023 First Prev 526–600 of 3,492 Next Last