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 900 70 18ms 13 Feb 2024 33rd Just4FunCoder 900 70 19ms 17 Feb 2024 33rd ThijsLuttikhuis 900 70 26ms 3 Mar 2024 33rd elgan65536 900 70 20ms 5 Mar 2024 33rd jtaxen 900 70 22ms 1 Apr 2024 33rd HumanoidCPU 900 70 29ms 6 May 2024 33rd abc7-12 900 70 18ms 6 May 2024 33rd ahmetdemirag 🇨🇾 900 70 19ms 9 Jun 2024 33rd FranklinJiaChen 900 70 19ms 4 Jul 2024 33rd 5cw 🇺🇸 900 70 18ms 13 Jul 2024 33rd CaedenHarper 🇨🇦 900 70 18ms 3 Aug 2024 33rd emgordon154 900 70 26ms 5 Aug 2024 33rd dokutan 900 70 19ms 9 Aug 2024 33rd jatloe 900 70 19ms 26 Aug 2024 33rd lgrandco 900 70 18ms 9 Oct 2024 33rd snydej 900 70 19ms 21 Nov 2024 33rd erikji 900 70 19ms 4 Feb 2025 33rd CutSandstone 900 70 20ms 4 Feb 2025 33rd albanian-laundromat 900 70 18ms 12 Apr 2025 33rd xsot 🇸🇬 900 70 20ms 3 May 2025 33rd fuzzylojik-golf 🇺🇸 900 70 19ms 14 Jun 2025 33rd smilesformiles3 900 70 22ms 14 Jun 2025 33rd KasperKivimaeki 🇫🇮 900 70 19ms 30 Jun 2025 33rd adaGrad1 900 70 20ms 10 Aug 2025 33rd EthanJantz 900 70 18ms 10 Aug 2025 33rd qpwoeirut 900 70 16ms 10 Aug 2025 33rd katss2 900 70 19ms 17 Aug 2025 33rd intgrah 900 70 22ms 23 Sep 2025 33rd ryyyn 🇺🇸 900 70 20ms 18 days ago 33rd luuumine 🇫🇷 900 70 19ms 13 days ago 33rd Babafaba 900 70 18ms 9 days ago 33rd commandblockguy 🇺🇸 900 70 22ms 21 hours ago 108th TFeld00 🇩🇰 887 71 25ms 17 May 2022 108th DialFrost 🇸🇬 887 71 36ms 15 Nov 2022 108th StefanHabel 🇨🇦 887 71 18ms 29 Nov 2022 108th nstearns96 🇬🇧 887 71 19ms 11 Jan 2023 108th hallvabo 🇳🇴 887 71 19ms 7 Feb 2023 108th anter69 🇭🇺 887 71 18ms 21 May 2024 108th rucin93 🇵🇱 887 71 17ms 10 Jul 2024 108th lelbal 887 71 18ms 26 Aug 2025 108th HETHAT 🇩🇿 887 71 24ms 23 Sep 2025 117th scpchicken 🇵🇼 875 72 20ms 4 May 2022 117th sultan 875 72 16ms 6 Jun 2022 117th annaproxy 875 72 21ms 22 Aug 2022 117th BlankSpruce 875 72 27ms 9 Sep 2022 117th ValentinCassayre 875 72 20ms 8 Oct 2022 117th mathb0y512 875 72 21ms 1 Dec 2022 117th NoahBolohan 🇨🇦 875 72 23ms 28 Feb 2023 117th neel11235813 875 72 19ms 8 Mar 2023 117th Kacarott 🇦🇺 875 72 15ms 24 Mar 2023 117th Fracture17 875 72 20ms 8 Apr 2023 117th ayushdewan 875 72 24ms 7 May 2023 117th PeterTillema 🇳🇱 875 72 24ms 17 Oct 2023 117th Glinte 875 72 23ms 11 Dec 2023 117th nanatsu8 875 72 25ms 11 May 2024 117th thej10n 875 72 20ms 12 Jun 2024 117th duckyluuk 🇳🇱 875 72 19ms 13 Jun 2024 117th tobeannouncd 875 72 16ms 25 Apr 2025 117th YAJUE114514 875 72 17ms 15 Aug 2025 117th blaztoma 🇱🇹 875 72 23ms 26 Sep 2025 136th AdamHe17 863 73 22ms 31 May 2022 136th AliceFord 863 73 21ms 2 Jun 2022 136th Natanaelel 🇸🇪 863 73 16ms 16 Jun 2022 136th btjones0 863 73 23ms 21 Jun 2022 136th marcin7Cd 863 73 19ms 27 Jun 2022 136th tri1212 🇻🇳 863 73 20ms 18 Jul 2022 136th vhoulbreque 🇫🇷 863 73 21ms 18 Aug 2022 136th KatieLG 🇬🇧 863 73 24ms 29 Aug 2022 136th tkr-sh 🇰🇵 863 73 21ms 8 Sep 2022 136th jroscoe5 863 73 21ms 15 Sep 2022 136th fredrik-bakke 🇳🇴 863 73 20ms 18 Sep 2022 136th firegene 🇮🇪 863 73 19ms 27 Sep 2022 136th OhmNomNom 863 73 24ms 7 Oct 2022 136th 0-4849 863 73 23ms 1 Nov 2022 136th M0PKOBKA 863 73 23ms 19 Dec 2022 First Prev 76–150 of 801 Next Last