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 Continued Fractions 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four 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 ><> ALGOL 68 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 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 ><> ALGOL 68 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 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 Continued Fractions 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 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four 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 75th JunkIce 905 63 24ms 24 Nov 2024 75th Kowalskiexe 🇵🇱 905 63 19ms 19 Apr 2025 75th 123mjb 905 63 24ms 2 Jun 2025 75th DrakeSeteraO 905 63 52ms 24 Oct 2025 75th enigma 905 63 33ms 21 Dec 2025 75th ASampsonMu31 905 63 50ms 8 hours ago 87th NerdyMcNerd42 891 64 20ms 26 Oct 2022 87th tpasfieldERAU 891 64 23ms 14 Nov 2022 87th CheeseCake628 🇳🇴 891 64 23ms 6 Jan 2023 87th adamnielson42 🇺🇸 891 64 19ms 25 Apr 2023 87th nathsou 🇫🇷 891 64 21ms 2 Sep 2023 87th zwxzwxzwx21 891 64 24ms 30 Jan 2024 87th steffan-polygolf 891 64 21ms 8 Mar 2024 87th Jacob385 891 64 59ms 4 Apr 2024 87th gallium-gonzollium 891 64 28ms 26 Aug 2024 96th yzhs 🇩🇪 877 65 20ms 16 Jun 2022 96th rollershutter 877 65 20ms 9 Sep 2022 96th bac0id 877 65 21ms 26 Sep 2023 96th robin-scragg 877 65 23ms 8 Jun 2025 96th RaBa21 🇭🇺 877 65 26ms 11 Jul 2025 96th TransformLikeATensor 877 65 19ms 17 Oct 2025 102nd moustave 851 67 23ms 7 Nov 2024 103rd Bubbler-4 838 68 15ms 15 Nov 2022 103rd neel11235813 838 68 25ms 31 Dec 2022 103rd Rubiksmath 838 68 15ms 14 Aug 2023 103rd SB-945 838 68 24ms 7 Feb 2024 103rd Languag3 838 68 16ms 12 days ago 108th nwellnhof 🇩🇪 826 69 24ms 4 May 2022 108th GolfingSuccess 🇬🇷 826 69 17ms 5 May 2022 108th jared-hughes 826 69 17ms 5 May 2022 108th sisyphus-ppcg 🇦🇺 826 69 15ms 6 May 2022 108th lynn 826 69 18ms 22 Aug 2022 108th AlexanderFair 826 69 24ms 19 Jul 2023 108th AlephSquirrel 826 69 476ms 30 Dec 2023 108th davecame 826 69 23ms 20 Aug 2024 108th salvatore-abello 826 69 23ms 5 Sep 2024 108th zacjl 826 69 17ms 19 Sep 2024 108th kops-cg 826 69 23ms 9 Feb 2025 108th 4atj 826 69 3,504ms 30 Jun 2025 108th dirckvdende 826 69 17ms 11 Jul 2025 108th xnor-gate 826 69 17ms 19 Aug 2025 108th BrunoVisnadi 🇧🇷 826 69 24ms 1 Oct 2025 108th bizy-coder 826 69 18ms 21 Nov 2025 108th bricknellj 826 69 17ms 4 Dec 2025 108th Seek64 🇩🇪 826 69 17ms 26 Dec 2025 126th MichalMarsalek 🇨🇿 814 70 20ms 5 May 2022 126th primo-ppcg 🇹🇭 814 70 25ms 5 May 2022 126th prplz 🇦🇺 814 70 21ms 5 May 2022 126th rak1507 🇬🇧 814 70 20ms 7 May 2022 126th inventshah 814 70 18ms 9 May 2022 126th k3w1k0d3r 814 70 20ms 22 Jun 2022 126th Bonjour27891 🇻🇳 814 70 20ms 14 Jul 2022 126th OllieBoyne 🇬🇧 814 70 20ms 19 Jul 2022 126th wen1now 814 70 20ms 8 Aug 2022 126th 051 🇸🇬 814 70 19ms 8 Aug 2022 126th Sp3000 🇦🇺 814 70 21ms 8 Aug 2022 126th betaveros 814 70 19ms 9 Aug 2022 126th shelerr 814 70 20ms 9 Sep 2022 126th stewSquared 🇺🇸 814 70 20ms 27 Sep 2022 126th myfatemi04 814 70 20ms 4 Nov 2022 126th kevinmchung 814 70 19ms 4 Nov 2022 126th fourth-bit 814 70 19ms 29 Nov 2022 126th aksyristos 814 70 20ms 25 Dec 2022 126th thizanne 814 70 20ms 27 Dec 2022 126th stefangimmillaro 814 70 21ms 6 Feb 2023 126th FieryIceStickie 814 70 18ms 3 Apr 2023 126th MeWhenI 🇻🇦 814 70 19ms 30 Apr 2023 126th kellantech 814 70 25ms 15 May 2023 126th InigoK 🇺🇸 814 70 20ms 14 Jun 2023 126th quimey 814 70 16ms 15 Jun 2023 126th janbehrens 🇩🇪 814 70 21ms 24 Nov 2023 126th namelessiw 814 70 19ms 9 Jan 2024 126th mathisfun271 814 70 20ms 13 Feb 2024 126th ThijsLuttikhuis 814 70 20ms 3 Mar 2024 126th jtaxen 814 70 19ms 1 Apr 2024 126th abc7-12 814 70 22ms 6 May 2024 126th ahmetdemirag 🇨🇾 814 70 20ms 9 Jun 2024 126th FranklinJiaChen 814 70 18ms 4 Jul 2024 126th 5cw 🇺🇸 814 70 21ms 13 Jul 2024 126th lgrandco 814 70 18ms 9 Oct 2024 First Prev 81–160 of 837 Next Last