Collatz in Python in bytes. Cheevos Holes Recent Holes Langs Medals Misc 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 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 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 Tower of Hanoi Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir 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 Erlang 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 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 Erlang 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 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 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 Tower of Hanoi Turtle Tutorial # Golfer Points Bytes Time Submitted 33rd mathisfun271 943 70 25ms 13 Feb 2024 33rd Just4FunCoder 943 70 23ms 17 Feb 2024 33rd ThijsLuttikhuis 943 70 19ms 3 Mar 2024 33rd elgan65536 943 70 20ms 5 Mar 2024 33rd jtaxen 943 70 19ms 1 Apr 2024 33rd HumanoidCPU 943 70 21ms 6 May 2024 33rd abc7-12 943 70 29ms 6 May 2024 33rd ahmetdemirag 🇨🇾 943 70 21ms 9 Jun 2024 33rd FranklinJiaChen 943 70 20ms 4 Jul 2024 33rd 5cw 🇺🇸 943 70 23ms 13 Jul 2024 33rd CaedenHarper 🇨🇦 943 70 20ms 3 Aug 2024 33rd emgordon154 943 70 29ms 5 Aug 2024 33rd dokutan 943 70 24ms 9 Aug 2024 33rd jatloe 943 70 21ms 26 Aug 2024 33rd lgrandco 943 70 20ms 9 Oct 2024 33rd snydej 943 70 26ms 21 Nov 2024 33rd erikji 943 70 25ms 4 Feb 2025 33rd CutSandstone 943 70 23ms 4 Feb 2025 33rd albanian-laundromat 943 70 29ms 12 Apr 2025 33rd xsot 🇸🇬 943 70 22ms 3 May 2025 33rd fuzzylojik-golf 🇺🇸 943 70 20ms 14 Jun 2025 33rd smilesformiles3 943 70 21ms 14 Jun 2025 33rd KasperKivimaeki 🇫🇮 943 70 19ms 30 Jun 2025 33rd adaGrad1 943 70 20ms 10 Aug 2025 33rd EthanJantz 943 70 19ms 10 Aug 2025 33rd qpwoeirut 943 70 18ms 10 Aug 2025 33rd katss2 943 70 24ms 17 Aug 2025 33rd intgrah 943 70 23ms 23 Sep 2025 33rd ryyyn 🇺🇸 943 70 19ms 14 days ago 33rd luuumine 🇫🇷 943 70 18ms 10 days ago 33rd Babafaba 943 70 18ms 6 days ago 107th TFeld00 🇩🇰 930 71 25ms 17 May 2022 107th DialFrost 🇸🇬 930 71 24ms 15 Nov 2022 107th StefanHabel 🇨🇦 930 71 19ms 29 Nov 2022 107th nstearns96 🇬🇧 930 71 18ms 11 Jan 2023 107th hallvabo 🇳🇴 930 71 19ms 7 Feb 2023 107th anter69 🇭🇺 930 71 18ms 21 May 2024 107th rucin93 🇵🇱 930 71 17ms 10 Jul 2024 107th lelbal 930 71 32ms 26 Aug 2025 107th HETHAT 🇩🇿 930 71 26ms 23 Sep 2025 116th scpchicken 🇵🇼 917 72 21ms 4 May 2022 116th sultan 917 72 16ms 6 Jun 2022 116th annaproxy 917 72 23ms 22 Aug 2022 116th BlankSpruce 917 72 40ms 9 Sep 2022 116th ValentinCassayre 917 72 21ms 8 Oct 2022 116th commandblockguy 🇺🇸 917 72 23ms 3 Nov 2022 116th mathb0y512 917 72 27ms 1 Dec 2022 116th NoahBolohan 🇨🇦 917 72 23ms 28 Feb 2023 116th neel11235813 917 72 22ms 8 Mar 2023 116th Kacarott 🇦🇺 917 72 17ms 24 Mar 2023 116th Fracture17 917 72 21ms 8 Apr 2023 116th ayushdewan 917 72 29ms 7 May 2023 116th PeterTillema 🇳🇱 917 72 22ms 17 Oct 2023 116th Glinte 917 72 35ms 11 Dec 2023 116th nanatsu8 917 72 26ms 11 May 2024 116th thej10n 917 72 23ms 12 Jun 2024 116th duckyluuk 🇳🇱 917 72 21ms 13 Jun 2024 116th tobeannouncd 917 72 22ms 25 Apr 2025 116th YAJUE114514 917 72 17ms 15 Aug 2025 116th blaztoma 🇱🇹 917 72 39ms 26 Sep 2025 136th AdamHe17 904 73 20ms 31 May 2022 136th AliceFord 904 73 26ms 2 Jun 2022 136th Natanaelel 🇸🇪 904 73 23ms 16 Jun 2022 136th btjones0 904 73 25ms 21 Jun 2022 136th marcin7Cd 904 73 22ms 27 Jun 2022 136th tri1212 🇻🇳 904 73 21ms 18 Jul 2022 136th vhoulbreque 🇫🇷 904 73 20ms 18 Aug 2022 136th KatieLG 🇬🇧 904 73 20ms 29 Aug 2022 136th tkr-sh 🇰🇵 904 73 25ms 8 Sep 2022 136th jroscoe5 904 73 22ms 15 Sep 2022 136th fredrik-bakke 🇳🇴 904 73 21ms 18 Sep 2022 136th firegene 🇮🇪 904 73 23ms 27 Sep 2022 136th OhmNomNom 904 73 24ms 7 Oct 2022 136th 0-4849 904 73 21ms 1 Nov 2022 136th M0PKOBKA 904 73 30ms 19 Dec 2022 First Prev 76–150 of 798 Next Last