Collatz in all languages 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 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 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 449th Steffan153 🇫🇮 915 87 389ms 16 May 2023 449th Lydxn 🇨🇦 915 87 465ms 16 May 2023 449th GrayJoKing 🇦🇺 915 87 400ms 11 Aug 2023 449th sean-niemann 🇺🇸 915 87 458ms 11 Jul 2024 455th ovs-code 🇩🇪 914 75 74ms 12 Sep 2024 455th Kacarott 🇦🇺 914 75 78ms 13 Sep 2024 457th Lydxn 🇨🇦 914 81 45ms 1 Apr 2023 458th AdamHe17 913 73 20ms 31 May 2022 458th AliceFord 913 73 26ms 2 Jun 2022 458th Natanaelel 🇸🇪 913 73 23ms 16 Jun 2022 458th btjones0 913 73 25ms 21 Jun 2022 458th marcin7Cd 913 73 22ms 27 Jun 2022 458th tri1212 🇻🇳 913 73 21ms 18 Jul 2022 458th vhoulbreque 🇫🇷 913 73 20ms 18 Aug 2022 458th KatieLG 🇬🇧 913 73 20ms 29 Aug 2022 458th tkr-sh 🇰🇵 913 73 25ms 8 Sep 2022 458th jroscoe5 913 73 22ms 15 Sep 2022 458th fredrik-bakke 🇳🇴 913 73 21ms 18 Sep 2022 458th firegene 🇮🇪 913 73 23ms 27 Sep 2022 458th OhmNomNom 913 73 24ms 7 Oct 2022 458th 0-4849 913 73 21ms 1 Nov 2022 458th M0PKOBKA 913 73 30ms 19 Dec 2022 458th calumacutt 913 73 24ms 19 Dec 2022 458th thehylian 913 73 21ms 2 Jan 2023 458th fynnkroeger 913 73 28ms 6 Jan 2023 458th shellbertt 🇨🇦 913 73 21ms 13 Jan 2023 458th hunt-g 913 73 22ms 4 Feb 2023 458th ljweel 913 73 20ms 13 Feb 2023 458th jmerle 🇳🇱 913 73 21ms 16 Feb 2023 458th TaserTheFox 🇺🇸 913 73 22ms 14 Mar 2023 458th pinguicula 913 73 19ms 6 Apr 2023 458th TheoKeller1 913 73 28ms 11 Jun 2023 458th fkantelberg 913 73 23ms 16 Jul 2023 458th Mikey-Beep 🇬🇧 913 73 21ms 31 Aug 2023 458th eiburns 913 73 24ms 9 Oct 2023 458th htareque 913 73 23ms 13 Oct 2023 458th wearsunscreen 913 73 20ms 18 Oct 2023 458th bzijlema 🇳🇱 913 73 21ms 25 Oct 2023 458th Grrisly 913 73 20ms 10 Nov 2023 458th m42km 913 73 25ms 11 Nov 2023 458th GeneralPoxter 913 73 24ms 7 Dec 2023 458th logvp 913 73 23ms 12 Jan 2024 458th JoaoFelipe3 913 73 24ms 13 Jan 2024 458th ehulinsky 🇺🇸 913 73 27ms 16 Feb 2024 458th Lewenhaupt 913 73 20ms 23 Feb 2024 458th Yewzir 🇧🇪 913 73 20ms 5 Apr 2024 458th stertooy 🇧🇪 913 73 20ms 9 Jun 2024 458th cuboids 913 73 21ms 11 Jul 2024 458th jipsong 🇩🇪 913 73 22ms 23 Jul 2024 458th mattyhempstead 913 73 21ms 6 Oct 2024 458th wh3n3v3r 🇨🇿 913 73 28ms 18 Nov 2024 458th klixel 🇨🇦 913 73 20ms 18 Nov 2024 458th tjwrenn 913 73 22ms 10 Dec 2024 458th nullie 913 73 24ms 19 Dec 2024 458th maxgodfrey2004 🇨🇦 913 73 33ms 13 Feb 2025 458th lolgeny 913 73 21ms 22 Feb 2025 458th andrewjc2000 913 73 33ms 23 Feb 2025 458th Languag3 913 73 21ms 27 Feb 2025 458th Bulmenisaurus 913 73 24ms 2 Mar 2025 458th souta-1326 913 73 20ms 1 Apr 2025 458th BenjaminHGong 913 73 22ms 26 May 2025 458th FEZfan 🇦🇺 913 73 20ms 11 Jul 2025 458th wuduculfre 913 73 23ms 28 Jul 2025 458th BREMAUCY 🇫🇷 913 73 24ms 24 Aug 2025 458th FortuiteMan 🇫🇷 913 73 22ms 28 Sep 2025 458th miaoaixuan 913 73 23ms 30 Sep 2025 517th andersk 🇺🇸 913 91 124ms 25 Oct 2022 517th Super-Pizza 🇨🇦 913 91 121ms 4 Dec 2022 517th klixel 🇨🇦 913 91 122ms 20 May 2023 517th lynn 913 91 121ms 6 Jul 2024 517th edsrzf 🇳🇿 913 91 121ms 29 Nov 2024 517th DialFrost 🇸🇬 913 91 123ms 7 Apr 2025 523rd lynn 912 78 1,390ms 5 May 2022 524th tailorspy 912 93 53ms 27 May 2024 524th sean-niemann 🇺🇸 912 93 54ms 9 Jun 2025 First Prev 451–525 of 3,429 Next Last
Steffan153
🇫🇮
Lydxn
🇨🇦
GrayJoKing
🇦🇺
sean-niemann
🇺🇸
ovs-code
🇩🇪
Kacarott
🇦🇺
AdamHe17
AliceFord
Natanaelel
🇸🇪
btjones0
marcin7Cd
tri1212
🇻🇳
vhoulbreque
🇫🇷
KatieLG
🇬🇧
tkr-sh
🇰🇵
jroscoe5
fredrik-bakke
🇳🇴
firegene
🇮🇪
OhmNomNom
0-4849
M0PKOBKA
calumacutt
thehylian
fynnkroeger
shellbertt
🇨🇦
hunt-g
ljweel
jmerle
🇳🇱
TaserTheFox
🇺🇸
pinguicula
TheoKeller1
fkantelberg
Mikey-Beep
🇬🇧
eiburns
htareque
wearsunscreen
bzijlema
🇳🇱
Grrisly
m42km
GeneralPoxter
logvp
JoaoFelipe3
ehulinsky
🇺🇸
Lewenhaupt
Yewzir
🇧🇪
stertooy
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cuboids
jipsong
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mattyhempstead
wh3n3v3r
🇨🇿
klixel
🇨🇦
tjwrenn
nullie
maxgodfrey2004
🇨🇦
lolgeny
andrewjc2000
Languag3
Bulmenisaurus
souta-1326
BenjaminHGong
FEZfan
🇦🇺
wuduculfre
BREMAUCY
🇫🇷
FortuiteMan
🇫🇷
miaoaixuan
andersk
🇺🇸
Super-Pizza
🇨🇦
lynn
edsrzf
🇳🇿
DialFrost
🇸🇬
tailorspy