Collatz in Python 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 Calendar 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 Multitap Input 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 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 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 ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 ArkScript Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily 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 Calendar 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 Multitap Input 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 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 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 559th mhsaul 679 84 18ms 11 Apr 2023 559th Phyisis 679 84 23ms 30 Apr 2024 559th MaxCastella 🇫🇷 679 84 23ms 11 Oct 2024 559th SURAJMITTAL 679 84 17ms 17 Dec 2024 559th simplylu 679 84 19ms 5 Jan 2025 559th WillowWispy 679 84 22ms 14 Mar 2025 559th VedJosh 679 84 26ms 3 May 2025 559th hetz2625 679 84 26ms 4 May 2025 559th ottav14 679 84 21ms 1 Dec 2025 559th benanlam 679 84 20ms 24 Dec 2025 571st aazuspan 671 85 19ms 15 Jun 2022 571st myleopard 671 85 23ms 20 Jul 2022 571st LukasFolwarczny 🇨🇿 671 85 25ms 16 Sep 2022 571st aaardwark 671 85 21ms 1 Jun 2025 571st kmathis22 671 85 20ms 10 Sep 2025 576th MichaelMBradley 🇨🇦 663 86 25ms 5 Jun 2022 576th Lemonz-13223 663 86 22ms 21 Sep 2022 576th Bodo171 663 86 24ms 24 Nov 2022 576th shibacho 🇯🇵 663 86 19ms 25 Nov 2022 576th Vaekor 663 86 18ms 9 Jul 2023 576th LeoVanderSteege 663 86 18ms 18 Nov 2023 576th Pale-Vessel 663 86 20ms 18 Dec 2023 576th tik25 663 86 25ms 28 Mar 2024 576th willschremmer 663 86 16ms 27 Apr 2024 576th jamiloBBKing 663 86 26ms 27 Jan 2025 576th AsishKunta 663 86 19ms 1 Apr 2025 576th Hemanthred2005 663 86 18ms 1 Apr 2025 576th Voltrifrodec 🇸🇰 663 86 23ms 19 Apr 2025 576th lurey99 663 86 18ms 23 Apr 2025 576th Alban-Boissard 663 86 25ms 14 Jun 2025 576th Arkadios200 663 86 26ms 21 Sep 2025 576th Andrey2001 663 86 27ms 27 Nov 2025 593rd ToE42 655 87 21ms 19 Oct 2022 593rd omri2001 655 87 19ms 19 Oct 2022 593rd Skallos-s 655 87 23ms 5 Dec 2022 593rd damoc1es 655 87 19ms 16 Apr 2023 593rd michelebastione 🇮🇹 655 87 27ms 20 Dec 2023 593rd clampcorder 655 87 19ms 24 Jan 2024 593rd GitQuick 655 87 19ms 23 Feb 2024 593rd EricSchraf 655 87 18ms 21 Mar 2024 593rd PotatoSaladOverlord 655 87 19ms 21 May 2025 593rd Ibozz91 655 87 24ms 8 Jun 2025 593rd Aquateraneal 655 87 17ms 13 Nov 2025 604th Andre3582 648 88 17ms 29 Oct 2022 604th Darknova2468 648 88 22ms 20 Nov 2022 604th Solsticely 648 88 20ms 20 Nov 2022 604th goGuru 648 88 20ms 21 Dec 2022 604th msbranicky 648 88 37ms 9 Aug 2023 604th gussy420 648 88 17ms 28 Oct 2023 604th Shynif 648 88 20ms 21 Feb 2024 604th asterized 648 88 19ms 24 Aug 2024 604th hippopotam00sehead 🇨🇦 648 88 19ms 11 Sep 2024 604th 08jne01 648 88 16ms 21 Nov 2024 604th davidludwik2370 648 88 19ms 14 Sep 2025 604th SectorCorruptor 648 88 22ms 8 days ago 616th lovernj 640 89 25ms 23 Aug 2022 616th Roj 640 89 21ms 20 Nov 2022 616th aeonsablaze 640 89 16ms 22 Nov 2022 616th buddyw 640 89 20ms 9 Mar 2023 616th VV1Git 640 89 19ms 28 Mar 2023 616th dranjohn 640 89 19ms 17 Sep 2023 616th ArenaGrenade 640 89 24ms 19 Feb 2024 616th NanduBC 640 89 22ms 6 Sep 2024 616th TheAtrossian 640 89 21ms 5 Jan 2025 616th KimJua41 640 89 21ms 4 May 2025 616th muser-logiccpu 🇺🇦 640 89 17ms 20 Aug 2025 627th StoverGitHub 633 90 20ms 16 Jun 2022 627th jamespeilunli 633 90 25ms 4 Jul 2022 627th TrentGlimp 633 90 20ms 3 Sep 2022 627th Ugoran 633 90 20ms 19 Nov 2022 627th PATTRIM 633 90 18ms 5 Jan 2023 627th charliegaming 633 90 20ms 3 Oct 2023 627th lhulinsky 633 90 20ms 22 Oct 2024 627th bthalheim 633 90 23ms 6 Dec 2024 627th SinArieh 633 90 27ms 4 May 2025 627th islptng 633 90 23ms 7 Jul 2025 627th Mr-McChicken 633 90 18ms 4 Oct 2025 627th NoneTheFewer 633 90 24ms 4 Dec 2025 639th AbelPelser 626 91 22ms 3 Jul 2022 639th Seis 626 91 19ms 9 Dec 2022 First Prev 561–640 of 825 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