Collatz in Python in bytes. 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 Gray Code Decoder Gray Code Encoder 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) Taxicab Numbers 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 Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers Huffman Encoder NFA Simulator Nim Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript 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 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 ArkScript 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 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 Gray Code Decoder Gray Code Encoder 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) Taxicab Numbers 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 Dragon Curve Ellipse Perimeters Flags Floyd-Steinberg Dithering Hexagonal Spiral Highly Composite Numbers Huffman Encoder NFA Simulator Nim Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 41st KasperKivimaeki 🇫🇮 900 70 20ms 30 Jun 2025 41st adaGrad1 900 70 20ms 10 Aug 2025 41st EthanJantz 900 70 21ms 10 Aug 2025 41st qpwoeirut 900 70 16ms 10 Aug 2025 41st katss2 900 70 19ms 17 Aug 2025 41st intgrah 900 70 21ms 23 Sep 2025 41st ryyyn 🇺🇸 900 70 23ms 29 Oct 2025 41st luuumine 🇫🇷 900 70 20ms 3 Nov 2025 41st Babafaba 900 70 19ms 7 Nov 2025 41st commandz0 🇺🇸 900 70 20ms 16 Nov 2025 41st hellopir2 900 70 20ms 23 Nov 2025 41st bzijlema 🇳🇱 900 70 21ms 3 Dec 2025 41st blaztoma 🇱🇹 900 70 23ms 16 Feb 2026 41st firegene 🇮🇪 900 70 20ms 25 Feb 2026 41st Googolplexo 🇷🇺 900 70 19ms 25 Mar 2026 41st edsrzf 🇳🇿 900 70 23ms 25 days ago 41st Mikey-Beep 🇬🇧 900 70 31ms 22 days ago 118th TFeld00 🇩🇰 887 71 25ms 17 May 2022 118th DialFrost 🇸🇬 887 71 26ms 15 Nov 2022 118th StefanHabel 🇨🇦 887 71 20ms 29 Nov 2022 118th nstearns96 🇬🇧 887 71 25ms 11 Jan 2023 118th hallvabo 🇳🇴 887 71 20ms 7 Feb 2023 118th anter69 🇭🇺 887 71 18ms 21 May 2024 118th rucin93 🇵🇱 887 71 19ms 10 Jul 2024 118th lelbal 887 71 20ms 26 Aug 2025 118th HETHAT 🇩🇿 887 71 23ms 23 Sep 2025 118th 09cf 887 71 17ms 18 Nov 2025 118th CommandLeo 🇮🇹 887 71 26ms 8 Jan 2026 118th Flekay 🇩🇪 887 71 20ms 12 Feb 2026 118th snoozingnewt 🇨🇦 887 71 20ms 13 Feb 2026 118th JOrE20 887 71 16ms 25 Feb 2026 118th scpchicken 🇵🇼 887 71 17ms 17 days ago 133rd sultan 875 72 24ms 6 Jun 2022 133rd annaproxy 875 72 24ms 22 Aug 2022 133rd BlankSpruce 875 72 24ms 9 Sep 2022 133rd ValentinCassayre 875 72 21ms 8 Oct 2022 133rd mathb0y512 875 72 24ms 1 Dec 2022 133rd NoahBolohan 🇨🇦 875 72 24ms 28 Feb 2023 133rd neel11235813 875 72 23ms 8 Mar 2023 133rd Kacarott 🇦🇺 875 72 16ms 24 Mar 2023 133rd Fracture17 875 72 20ms 8 Apr 2023 133rd ayushdewan 875 72 24ms 7 May 2023 133rd PeterTillema 🇳🇱 875 72 25ms 17 Oct 2023 133rd Glinte 875 72 25ms 11 Dec 2023 133rd nanatsu8 875 72 25ms 11 May 2024 133rd thej10n 875 72 19ms 12 Jun 2024 133rd tobeannouncd 875 72 19ms 25 Apr 2025 133rd YAJUE114514 875 72 17ms 15 Aug 2025 133rd madex 🇩🇪 875 72 25ms 15 Mar 2026 133rd solisolu 875 72 19ms 19 days ago 151st AdamHe17 863 73 22ms 31 May 2022 151st AliceFord 863 73 20ms 2 Jun 2022 151st Natanaelel 🇸🇪 863 73 17ms 16 Jun 2022 151st btjones0 863 73 24ms 21 Jun 2022 151st marcin7Cd 863 73 20ms 27 Jun 2022 151st tri1212 🇻🇳 863 73 21ms 18 Jul 2022 151st vhoulbreque 🇫🇷 863 73 22ms 18 Aug 2022 151st KatieLG 🇬🇧 863 73 20ms 29 Aug 2022 151st tkr-sh 🇰🇵 863 73 22ms 8 Sep 2022 151st jroscoe5 863 73 21ms 15 Sep 2022 151st fredrik-bakke 🇳🇴 863 73 22ms 18 Sep 2022 151st OhmNomNom 863 73 26ms 7 Oct 2022 151st 0-4849 863 73 22ms 1 Nov 2022 151st M0PKOBKA 863 73 24ms 19 Dec 2022 151st calumacutt 863 73 25ms 19 Dec 2022 151st thehylian 863 73 23ms 2 Jan 2023 151st fynnkroeger 863 73 24ms 6 Jan 2023 151st shellbertt 🇨🇦 863 73 24ms 13 Jan 2023 151st hunt-g 863 73 20ms 4 Feb 2023 151st ljweel 863 73 21ms 13 Feb 2023 151st jmerle 🇳🇱 863 73 21ms 16 Feb 2023 151st TaserTheFox 🇺🇸 863 73 30ms 14 Mar 2023 151st pinguicula 863 73 20ms 6 Apr 2023 151st TheoKeller1 863 73 24ms 11 Jun 2023 151st fkantelberg 863 73 21ms 16 Jul 2023 151st eiburns 863 73 24ms 9 Oct 2023 151st htareque 863 73 25ms 13 Oct 2023 151st wearsunscreen 863 73 20ms 18 Oct 2023 151st Grrisly 863 73 20ms 10 Nov 2023 151st m42km 863 73 23ms 11 Nov 2023 151st GeneralPoxter 863 73 20ms 7 Dec 2023 151st logvp 863 73 26ms 12 Jan 2024 151st JoaoFelipe3 863 73 23ms 13 Jan 2024 151st ehulinsky 🇺🇸 863 73 20ms 16 Feb 2024 151st Lewenhaupt 863 73 20ms 23 Feb 2024 151st Yewzir 🇧🇪 863 73 20ms 5 Apr 2024 151st stertooy 🇧🇪 863 73 22ms 9 Jun 2024 151st cuboids 863 73 21ms 11 Jul 2024 151st jipsong 🇩🇪 863 73 21ms 23 Jul 2024 151st mattyhempstead 863 73 24ms 6 Oct 2024 151st wh3n3v3r 🇨🇿 863 73 20ms 18 Nov 2024 151st klixel 🇨🇦 863 73 21ms 18 Nov 2024 151st tjwrenn 863 73 22ms 10 Dec 2024 151st nullie 863 73 19ms 19 Dec 2024 151st maxgodfrey2004 🇨🇦 863 73 21ms 13 Feb 2025 151st lolgeny 863 73 19ms 22 Feb 2025 151st andrewjc2000 863 73 21ms 23 Feb 2025 151st Bulmenisaurus 863 73 23ms 2 Mar 2025 151st souta-1326 863 73 31ms 1 Apr 2025 151st BenjaminHGong 863 73 21ms 26 May 2025 First Prev 101–200 of 853 Next Last