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 557th MaxCastella 🇫🇷 679 84 23ms 11 Oct 2024 557th SURAJMITTAL 679 84 17ms 17 Dec 2024 557th simplylu 679 84 19ms 5 Jan 2025 557th WillowWispy 679 84 22ms 14 Mar 2025 557th VedJosh 679 84 26ms 3 May 2025 557th hetz2625 679 84 26ms 4 May 2025 557th ottav14 679 84 21ms 1 Dec 2025 557th benanlam 679 84 20ms 24 Dec 2025 569th aazuspan 671 85 19ms 15 Jun 2022 569th myleopard 671 85 23ms 20 Jul 2022 569th LukasFolwarczny 🇨🇿 671 85 25ms 16 Sep 2022 569th aaardwark 671 85 21ms 1 Jun 2025 569th kmathis22 671 85 20ms 10 Sep 2025 574th MichaelMBradley 🇨🇦 663 86 25ms 5 Jun 2022 574th Lemonz-13223 663 86 22ms 21 Sep 2022 574th Bodo171 663 86 24ms 24 Nov 2022 574th shibacho 🇯🇵 663 86 19ms 25 Nov 2022 574th Vaekor 663 86 18ms 9 Jul 2023 574th LeoVanderSteege 663 86 18ms 18 Nov 2023 574th Pale-Vessel 663 86 20ms 18 Dec 2023 574th tik25 663 86 25ms 28 Mar 2024 574th willschremmer 663 86 16ms 27 Apr 2024 574th jamiloBBKing 663 86 26ms 27 Jan 2025 574th AsishKunta 663 86 19ms 1 Apr 2025 574th Hemanthred2005 663 86 18ms 1 Apr 2025 574th Voltrifrodec 🇸🇰 663 86 23ms 19 Apr 2025 574th lurey99 663 86 18ms 23 Apr 2025 574th Alban-Boissard 663 86 25ms 14 Jun 2025 574th Arkadios200 663 86 26ms 21 Sep 2025 574th Andrey2001 663 86 27ms 27 Nov 2025 591st ToE42 655 87 21ms 19 Oct 2022 591st omri2001 655 87 19ms 19 Oct 2022 591st Skallos-s 655 87 23ms 5 Dec 2022 591st damoc1es 655 87 19ms 16 Apr 2023 591st michelebastione 🇮🇹 655 87 27ms 20 Dec 2023 591st clampcorder 655 87 19ms 24 Jan 2024 591st GitQuick 655 87 19ms 23 Feb 2024 591st EricSchraf 655 87 18ms 21 Mar 2024 591st PotatoSaladOverlord 655 87 19ms 21 May 2025 591st Ibozz91 655 87 24ms 8 Jun 2025 591st Aquateraneal 655 87 20ms 13 Nov 2025 602nd Andre3582 648 88 17ms 29 Oct 2022 602nd Darknova2468 648 88 22ms 20 Nov 2022 602nd Solsticely 648 88 20ms 20 Nov 2022 602nd goGuru 648 88 20ms 21 Dec 2022 602nd msbranicky 648 88 37ms 9 Aug 2023 602nd gussy420 648 88 17ms 28 Oct 2023 602nd Shynif 648 88 20ms 21 Feb 2024 602nd asterized 648 88 19ms 24 Aug 2024 602nd hippopotam00sehead 🇨🇦 648 88 19ms 11 Sep 2024 602nd 08jne01 648 88 16ms 21 Nov 2024 602nd davidludwik2370 648 88 19ms 14 Sep 2025 613th lovernj 640 89 25ms 23 Aug 2022 613th Roj 640 89 21ms 20 Nov 2022 613th aeonsablaze 640 89 16ms 22 Nov 2022 613th buddyw 640 89 20ms 9 Mar 2023 613th VV1Git 640 89 19ms 28 Mar 2023 613th dranjohn 640 89 19ms 17 Sep 2023 613th ArenaGrenade 640 89 24ms 19 Feb 2024 613th NanduBC 640 89 22ms 6 Sep 2024 613th TheAtrossian 640 89 21ms 5 Jan 2025 613th KimJua41 640 89 21ms 4 May 2025 613th muser-logiccpu 🇺🇦 640 89 17ms 20 Aug 2025 624th StoverGitHub 633 90 20ms 16 Jun 2022 624th jamespeilunli 633 90 25ms 4 Jul 2022 624th TrentGlimp 633 90 20ms 3 Sep 2022 624th Ugoran 633 90 20ms 19 Nov 2022 624th PATTRIM 633 90 18ms 5 Jan 2023 624th charliegaming 633 90 20ms 3 Oct 2023 624th lhulinsky 633 90 20ms 22 Oct 2024 624th bthalheim 633 90 23ms 6 Dec 2024 624th SinArieh 633 90 27ms 4 May 2025 624th islptng 633 90 23ms 7 Jul 2025 624th Mr-McChicken 633 90 18ms 4 Oct 2025 624th NoneTheFewer 633 90 24ms 4 Dec 2025 636th AbelPelser 626 91 22ms 3 Jul 2022 636th Seis 626 91 19ms 9 Dec 2022 636th r-i-c-e 626 91 20ms 9 Jul 2023 636th joshcors 626 91 17ms 30 Jun 2024 636th resoNathan 626 91 17ms 9 Jul 2024 First Prev 561–640 of 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