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 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 NFA Simulator 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 NFA Simulator 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 599th aeonsablaze 640 89 16ms 22 Nov 2022 599th buddyw 640 89 18ms 9 Mar 2023 599th VV1Git 640 89 20ms 28 Mar 2023 599th dranjohn 640 89 21ms 17 Sep 2023 599th ArenaGrenade 640 89 22ms 19 Feb 2024 599th NanduBC 640 89 21ms 6 Sep 2024 599th TheAtrossian 640 89 19ms 5 Jan 2025 599th KimJua41 640 89 18ms 4 May 2025 599th Upload-and-View 🇺🇦 640 89 16ms 20 Aug 2025 610th StoverGitHub 633 90 19ms 16 Jun 2022 610th jamespeilunli 633 90 22ms 4 Jul 2022 610th TrentGlimp 633 90 18ms 3 Sep 2022 610th Ugoran 633 90 18ms 19 Nov 2022 610th PATTRIM 633 90 16ms 5 Jan 2023 610th charliegaming 633 90 18ms 3 Oct 2023 610th lhulinsky 633 90 18ms 22 Oct 2024 610th bthalheim 633 90 21ms 6 Dec 2024 610th SinArieh 633 90 23ms 4 May 2025 610th islptng 633 90 22ms 7 Jul 2025 610th Mr-McChicken 633 90 16ms 4 Oct 2025 621st AbelPelser 626 91 21ms 3 Jul 2022 621st Seis 626 91 19ms 9 Dec 2022 621st r-i-c-e 626 91 18ms 9 Jul 2023 621st joshcors 626 91 16ms 30 Jun 2024 621st resoNathan 626 91 15ms 9 Jul 2024 621st jameswmccarty 626 91 22ms 24 Sep 2024 621st hamilton-bonds 626 91 16ms 12 Nov 2024 621st Wonamm 626 91 29ms 14 Feb 2025 629th TimLeffke 620 92 21ms 17 Aug 2022 629th Rythoka 620 92 14ms 17 Oct 2022 629th UriyaBA 620 92 17ms 19 Mar 2023 629th VladislavGitter 🇪🇸 620 92 18ms 14 Nov 2023 629th ridingqwerty 🇺🇸 620 92 17ms 22 Dec 2023 629th Thonoton 620 92 19ms 1 Feb 2024 629th OCNeve 620 92 19ms 17 Jun 2024 629th themoonisacheese 620 92 23ms 25 Feb 2025 629th BabySharkHi 620 92 24ms 22 Apr 2025 629th arjunarya1 620 92 18ms 28 Aug 2025 629th TJK-S 620 92 20ms 10 Oct 2025 640th Bananapants22 613 93 25ms 4 Sep 2022 640th jaxmattfair 🇺🇸 613 93 17ms 10 Jan 2023 640th fenix-bear 613 93 18ms 18 Nov 2023 640th epic-programmer-guy 613 93 22ms 22 Dec 2023 640th brimstonetrader 613 93 23ms 18 Nov 2024 645th atazzam 🇺🇸 606 94 17ms 18 May 2022 645th rohangpta 606 94 15ms 8 Aug 2022 645th shinylego 606 94 18ms 14 Sep 2022 645th sgaltair 606 94 20ms 4 Nov 2022 645th TotoAJ 606 94 22ms 15 Dec 2023 645th Gusic06 606 94 19ms 6 May 2024 645th kyleyarwood 606 94 21ms 6 Oct 2024 645th jj0786-cell 606 94 18ms 1 Apr 2025 645th griffinschreiber 606 94 18ms 1 Apr 2025 645th o800 606 94 18ms 15 days ago 655th felixcroc 600 95 18ms 30 Mar 2023 655th Pyro569 600 95 19ms 4 Jul 2023 655th rm-rf-innocence 600 95 20ms 19 Dec 2023 655th Bit125 600 95 18ms 30 Jan 2024 655th aalec 600 95 21ms 25 Apr 2024 655th strogor 600 95 18ms 13 Jun 2025 655th cthierfelder 🇲🇨 600 95 18ms 17 Jul 2025 655th ThomasDelepine 600 95 23ms 29 Oct 2025 663rd karhuthebear 594 96 23ms 9 May 2022 663rd qwjhvbxi 594 96 19ms 6 Feb 2024 663rd alfonsoalves 594 96 18ms 21 Jul 2024 663rd jeff-re 594 96 14ms 1 Apr 2025 667th a-penton 588 97 16ms 22 Sep 2022 667th jrbud 588 97 17ms 6 Jan 2024 667th befoster 588 97 21ms 22 Feb 2024 667th joshua-el-samalouti 🇩🇪 588 97 19ms 26 May 2024 667th luca1339 588 97 20ms 10 Jun 2024 672nd lukemalek 582 98 14ms 10 Oct 2022 672nd UltimateGuy0987 582 98 19ms 14 Oct 2022 672nd TheLazySquid 582 98 20ms 20 Dec 2022 672nd StronkCheese 🇺🇸 582 98 19ms 13 Mar 2023 First Prev 601–675 of 808 Next Last