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 387th CatsAreFluffy 750 76 26ms 18 Feb 2023 387th Schreipfelerer 750 76 27ms 9 Apr 2023 387th hm5822 750 76 28ms 22 Apr 2023 387th celiendonze 🇨🇭 750 76 28ms 5 Jul 2023 387th brochmann 🇸🇪 750 76 21ms 13 Aug 2023 387th Command-Master 750 76 36ms 2 Oct 2023 387th chartung17 750 76 22ms 17 Dec 2023 387th smokestacklightnin 🇺🇸 750 76 29ms 10 Jan 2024 387th NickTheEASDude 🇺🇸 750 76 53ms 26 Jan 2024 387th yuchuehw 750 76 26ms 2 Feb 2024 387th Azearia 750 76 27ms 26 Feb 2024 387th khavik 750 76 29ms 29 May 2024 387th Ythaenagor 750 76 22ms 5 Aug 2024 387th martion2007 750 76 55ms 9 Aug 2024 387th sjrct 750 76 26ms 10 Aug 2024 387th Mathrew2012 750 76 21ms 9 Nov 2024 387th kawrei 750 76 29ms 4 May 2025 387th mathieurodic 750 76 36ms 21 Oct 2025 387th yoikolover 750 76 25ms 11 Dec 2025 387th matricronia 750 76 27ms 8 days ago 421st cooljoseph1 740 77 24ms 6 May 2022 421st krcs 🇵🇱 740 77 22ms 11 May 2022 421st kenballus 740 77 28ms 13 Jul 2022 421st 104210 740 77 28ms 29 Jul 2022 421st andre-de-lorde 740 77 21ms 1 Sep 2022 421st zstephe 740 77 27ms 2 Dec 2022 421st badboj40 740 77 24ms 27 Dec 2022 421st henrytranter 740 77 30ms 11 Jan 2023 421st DragonaireM 740 77 22ms 6 Feb 2023 421st Ty-Cyr 740 77 19ms 14 Jul 2023 421st camieac 🇬🇧 740 77 23ms 14 Jul 2023 421st MisterrLuck 740 77 23ms 7 Sep 2023 421st alexjurkiewicz 🇦🇺 740 77 20ms 7 Nov 2023 421st askipio 740 77 23ms 22 Nov 2023 421st enbyte 740 77 19ms 9 Dec 2023 421st trinityy-7 740 77 24ms 17 Dec 2023 421st PyryL 🇫🇮 740 77 20ms 23 Aug 2024 421st CyberTapir 740 77 25ms 27 Aug 2024 421st junten1 740 77 25ms 20 Oct 2024 421st croc54 740 77 26ms 24 Dec 2024 421st za3k 740 77 24ms 3 Jun 2025 421st j-zhang43 740 77 25ms 17 Nov 2025 443rd AGoyet 731 78 25ms 29 Jul 2022 443rd RYNO8 731 78 23ms 16 Aug 2022 443rd TheCod-r 🇦🇶 731 78 27ms 28 Sep 2022 443rd Marthe-CC 731 78 24ms 9 Oct 2022 443rd Wildst 731 78 19ms 2 Nov 2022 443rd nmgetahun 731 78 22ms 4 Dec 2022 443rd Techdude01 731 78 25ms 13 Dec 2022 443rd tvcv901 731 78 19ms 22 Mar 2023 443rd oceko 731 78 22ms 24 Mar 2023 443rd yoyoyonono 731 78 26ms 15 May 2023 443rd Nic0M 731 78 23ms 13 Aug 2023 443rd ssbhatt4321 731 78 25ms 14 Oct 2023 443rd wyarde 731 78 19ms 7 Nov 2023 443rd ItsEthanXYZ 731 78 19ms 24 Dec 2023 443rd adamreidsmith 731 78 26ms 16 Feb 2024 443rd DGipe 731 78 23ms 13 May 2024 443rd cyxv 731 78 27ms 2 Aug 2024 443rd Europe2048 731 78 19ms 24 Nov 2024 443rd GeneralFabian 731 78 27ms 14 Dec 2024 443rd skaravind 731 78 20ms 18 days ago 443rd samuel-thesing 🇩🇪 731 78 26ms 9 days ago 464th kevdah 722 79 25ms 27 May 2022 464th jacklynnepenick 722 79 20ms 22 Jun 2022 464th james-downey 722 79 28ms 9 Jul 2022 464th andre-lameirinhas 🇵🇹 722 79 23ms 26 Jul 2022 464th hamsterskywalker 722 79 21ms 7 Sep 2022 464th Pena86 722 79 26ms 14 Sep 2022 464th hymanimy 722 79 27ms 24 Nov 2022 464th Demonarchet 722 79 19ms 18 Apr 2023 464th dtaylor0 722 79 20ms 23 May 2023 464th neonchickens 722 79 26ms 6 Oct 2023 464th MWI-polygolf 722 79 20ms 6 Dec 2023 464th eddvrs 722 79 22ms 22 Dec 2023 464th tknight00 722 79 26ms 7 Mar 2024 464th thienudomsrirungruang 722 79 48ms 3 May 2024 464th IsaacAlexBarden 722 79 25ms 6 Feb 2025 464th taesungh 722 79 23ms 7 Jun 2025 464th benvreeves 722 79 21ms 25 Jul 2025 First Prev 401–480 of 823 Next 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