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 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 600th Roj 640 89 22ms 20 Nov 2022 600th aeonsablaze 640 89 16ms 22 Nov 2022 600th buddyw 640 89 16ms 9 Mar 2023 600th VV1Git 640 89 19ms 28 Mar 2023 600th dranjohn 640 89 20ms 17 Sep 2023 600th ArenaGrenade 640 89 24ms 19 Feb 2024 600th NanduBC 640 89 21ms 6 Sep 2024 600th TheAtrossian 640 89 20ms 5 Jan 2025 600th KimJua41 640 89 19ms 4 May 2025 600th Upload-and-View 🇺🇦 640 89 16ms 20 Aug 2025 611th StoverGitHub 633 90 22ms 16 Jun 2022 611th jamespeilunli 633 90 26ms 4 Jul 2022 611th TrentGlimp 633 90 19ms 3 Sep 2022 611th Ugoran 633 90 18ms 19 Nov 2022 611th PATTRIM 633 90 17ms 5 Jan 2023 611th charliegaming 633 90 18ms 3 Oct 2023 611th lhulinsky 633 90 21ms 22 Oct 2024 611th bthalheim 633 90 23ms 6 Dec 2024 611th SinArieh 633 90 23ms 4 May 2025 611th islptng 633 90 22ms 7 Jul 2025 611th Mr-McChicken 633 90 16ms 4 Oct 2025 611th NoneTheFewer 633 90 18ms 7 days ago 623rd AbelPelser 626 91 20ms 3 Jul 2022 623rd Seis 626 91 18ms 9 Dec 2022 623rd r-i-c-e 626 91 19ms 9 Jul 2023 623rd joshcors 626 91 16ms 30 Jun 2024 623rd resoNathan 626 91 16ms 9 Jul 2024 623rd jameswmccarty 626 91 21ms 24 Sep 2024 623rd hamilton-bonds 626 91 17ms 12 Nov 2024 623rd Wonamm 626 91 26ms 14 Feb 2025 631st TimLeffke 620 92 22ms 17 Aug 2022 631st Rythoka 620 92 14ms 17 Oct 2022 631st UriyaBA 620 92 16ms 19 Mar 2023 631st VladislavGitter 🇪🇸 620 92 18ms 14 Nov 2023 631st ridingqwerty 🇺🇸 620 92 17ms 22 Dec 2023 631st Thonoton 620 92 18ms 1 Feb 2024 631st OCNeve 620 92 19ms 17 Jun 2024 631st themoonisacheese 620 92 22ms 25 Feb 2025 631st BabySharkHi 620 92 20ms 22 Apr 2025 631st arjunarya1 620 92 16ms 28 Aug 2025 631st TJK-S 620 92 18ms 10 Oct 2025 642nd Bananapants22 613 93 28ms 4 Sep 2022 642nd jaxmattfair 🇺🇸 613 93 19ms 10 Jan 2023 642nd fenix-bear 613 93 19ms 18 Nov 2023 642nd epic-programmer-guy 613 93 23ms 22 Dec 2023 642nd brimstonetrader 613 93 22ms 18 Nov 2024 647th atazzam 🇺🇸 606 94 17ms 18 May 2022 647th rohangpta 606 94 16ms 8 Aug 2022 647th shinylego 606 94 18ms 14 Sep 2022 647th sgaltair 606 94 20ms 4 Nov 2022 647th TotoAJ 606 94 19ms 15 Dec 2023 647th Gusic06 606 94 18ms 6 May 2024 647th kyleyarwood 606 94 20ms 6 Oct 2024 647th jj0786-cell 606 94 19ms 1 Apr 2025 647th griffinschreiber 606 94 19ms 1 Apr 2025 647th o800 606 94 17ms 24 days ago 657th felixcroc 600 95 18ms 30 Mar 2023 657th Pyro569 600 95 19ms 4 Jul 2023 657th rm-rf-innocence 600 95 19ms 19 Dec 2023 657th Bit125 600 95 19ms 30 Jan 2024 657th aalec 600 95 20ms 25 Apr 2024 657th strogor 600 95 19ms 13 Jun 2025 657th cthierfelder 🇲🇨 600 95 19ms 17 Jul 2025 657th ThomasDelepine 600 95 24ms 29 Oct 2025 665th karhuthebear 594 96 24ms 9 May 2022 665th qwjhvbxi 594 96 19ms 6 Feb 2024 665th alfonsoalves 594 96 18ms 21 Jul 2024 665th jeff-re 594 96 15ms 1 Apr 2025 669th a-penton 588 97 15ms 22 Sep 2022 669th jrbud 588 97 18ms 6 Jan 2024 669th befoster 588 97 23ms 22 Feb 2024 669th joshua-el-samalouti 🇩🇪 588 97 22ms 26 May 2024 669th luca1339 588 97 18ms 10 Jun 2024 674th lukemalek 582 98 15ms 10 Oct 2022 674th UltimateGuy0987 582 98 20ms 14 Oct 2022 First Prev 601–675 of 809 Next Last