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) 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 NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab 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) 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 NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Bytes Time Submitted 382nd brochmann 🇸🇪 829 76 22ms 13 Aug 2023 382nd Command-Master 829 76 35ms 2 Oct 2023 382nd chartung17 829 76 20ms 17 Dec 2023 382nd smokestacklightnin 🇺🇸 829 76 29ms 10 Jan 2024 382nd NickTheEASDude 🇺🇸 829 76 60ms 26 Jan 2024 382nd yuchuehw 829 76 29ms 2 Feb 2024 382nd Azearia 829 76 27ms 26 Feb 2024 382nd tpasfieldERAU 829 76 24ms 18 May 2024 382nd khavik 829 76 27ms 29 May 2024 382nd Ythaenagor 829 76 23ms 5 Aug 2024 382nd martion2007 829 76 56ms 9 Aug 2024 382nd sjrct 829 76 28ms 10 Aug 2024 382nd Mathrew2012 829 76 16ms 9 Nov 2024 382nd kawrei 829 76 28ms 4 May 2025 382nd RaBa21 🇭🇺 829 76 26ms 19 Jul 2025 382nd mathieurodic 829 76 26ms 21 Oct 2025 382nd DrakeSeteraO 829 76 54ms 24 Oct 2025 382nd yoikolover 829 76 26ms 11 Dec 2025 382nd matricronia 829 76 28ms 28 Jan 2026 382nd muser-logiccpu 🇺🇦 829 76 25ms 24 Feb 2026 382nd Ignacio6D2 829 76 20ms 26 Feb 2026 382nd mkikta 829 76 27ms 16 days ago 423rd cooljoseph1 818 77 24ms 6 May 2022 423rd krcs 🇵🇱 818 77 22ms 11 May 2022 423rd kenballus 818 77 26ms 13 Jul 2022 423rd 104210 818 77 26ms 29 Jul 2022 423rd andre-de-lorde 818 77 20ms 1 Sep 2022 423rd zstephe 818 77 28ms 2 Dec 2022 423rd badboj40 818 77 25ms 27 Dec 2022 423rd henrytranter 818 77 25ms 11 Jan 2023 423rd DragonaireM 818 77 24ms 6 Feb 2023 423rd steffan-polygolf 818 77 21ms 19 Feb 2023 423rd kellantech 818 77 20ms 21 May 2023 423rd Ty-Cyr 818 77 19ms 14 Jul 2023 423rd camieac 🇬🇧 818 77 23ms 14 Jul 2023 423rd nathsou 🇫🇷 818 77 21ms 2 Sep 2023 423rd MisterrLuck 818 77 24ms 7 Sep 2023 423rd alexjurkiewicz 🇦🇺 818 77 20ms 7 Nov 2023 423rd askipio 818 77 23ms 22 Nov 2023 423rd trinityy-7 818 77 23ms 17 Dec 2023 423rd zwxzwxzwx21 818 77 25ms 30 Jan 2024 423rd PyryL 🇫🇮 818 77 20ms 23 Aug 2024 423rd CyberTapir 818 77 25ms 27 Aug 2024 423rd junten1 818 77 27ms 20 Oct 2024 423rd croc54 818 77 28ms 24 Dec 2024 423rd za3k 818 77 26ms 3 Jun 2025 423rd robin-scragg 818 77 26ms 17 Aug 2025 423rd j-zhang43 818 77 23ms 17 Nov 2025 423rd Andrey2001 818 77 24ms 24 days ago 450th AGoyet 808 78 25ms 29 Jul 2022 450th RYNO8 808 78 23ms 16 Aug 2022 450th TheCod-r 🇦🇶 808 78 27ms 28 Sep 2022 450th Marthe-CC 808 78 23ms 9 Oct 2022 450th Wildst 808 78 24ms 2 Nov 2022 450th nmgetahun 808 78 24ms 4 Dec 2022 450th Techdude01 808 78 25ms 13 Dec 2022 450th tvcv901 808 78 21ms 22 Mar 2023 450th oceko 808 78 20ms 24 Mar 2023 450th yoyoyonono 808 78 27ms 15 May 2023 450th Nic0M 808 78 20ms 13 Aug 2023 450th ssbhatt4321 808 78 26ms 14 Oct 2023 450th wyarde 808 78 21ms 7 Nov 2023 450th ItsEthanDev 808 78 21ms 24 Dec 2023 450th adamreidsmith 808 78 30ms 16 Feb 2024 450th Jacob385 808 78 60ms 5 Mar 2024 450th DGipe 808 78 23ms 13 May 2024 450th cyxv 808 78 27ms 2 Aug 2024 450th gallium-gonzollium 808 78 28ms 26 Aug 2024 450th Europe2048 808 78 20ms 24 Nov 2024 450th GeneralFabian 808 78 27ms 14 Dec 2024 450th skaravind 808 78 23ms 19 Jan 2026 450th samuel-thesing 🇩🇪 808 78 29ms 28 Jan 2026 450th SectorCorruptor 808 78 32ms 1 Mar 2026 450th Deppyforce 808 78 20ms 13 Mar 2026 450th denkyuu1 808 78 22ms 27 Mar 2026 476th kevdah 797 79 22ms 27 May 2022 476th jacklynnepenick 797 79 19ms 22 Jun 2022 476th james-downey 797 79 25ms 9 Jul 2022 476th andre-lameirinhas 🇵🇹 797 79 24ms 26 Jul 2022 476th hamsterskywalker 797 79 21ms 7 Sep 2022 First Prev 401–480 of 853 Next Last
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