The Calendar hole will go live in approximately 10 days. Why not try and solve it ahead of time?
Rijndael S-box in all languages in chars. 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 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 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 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel 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 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 ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel 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 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 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 720th KatieLG-Transpiler 🇬🇧 217 776 4ms 2 Sep 2023 720th KatieLG 🇬🇧 217 776 4ms 28 Sep 2024 723rd Stanbroek 216 291 2ms 18 Sep 2023 724th Jacob385 216 415 364ms 18 Apr 2024 725th dokutan 214 686 250ms 8 days ago 726th snoozingnewt 🇨🇦 213 791 4ms 2 Sep 2023 726th HumanoidCPU 213 791 3ms 16 Apr 2024 726th Mabeloid 🇳🇴 213 791 4ms 21 Sep 2024 729th KatieLG 🇬🇧 212 789 104ms 2 Sep 2023 729th Shanethegamer 🇺🇸 212 789 99ms 3 Sep 2023 729th HumanoidCPU 212 789 97ms 27 May 2024 729th dokutan 212 789 100ms 20 Aug 2024 729th RedzGoose 🇦🇺 212 789 99ms 7 Oct 2024 729th CaedenHarper 🇨🇦 212 789 100ms 20 Jan 2025 735th Mabeloid 🇳🇴 211 794 96ms 21 Sep 2024 736th enbyte 210 415 10ms 9 Dec 2023 736th jatloe 210 415 11ms 29 Jan 2024 736th Jacob385 210 415 11ms 18 Apr 2024 739th msbranicky 210 590 2ms 28 Sep 2023 740th TheEric0802 🇩🇪 210 622 3ms 22 Sep 2023 741st MichalMarsalek 🇨🇿 209 570 124ms 1 Sep 2023 742nd MeWhenI 🇻🇦 209 800 100ms 1 Sep 2023 742nd gigaprofisi 🇺🇸 209 800 104ms 13 Nov 2025 744th Emutis 🇱🇹 208 420 16ms 5 Oct 2025 745th HumanoidCPU 204 773 3,451ms 24 Oct 2024 745th Shanethegamer 🇺🇸 204 773 3,528ms 24 Oct 2024 745th KatieLG 🇬🇧 204 773 3,620ms 27 Oct 2024 745th CaedenHarper 🇨🇦 204 773 3,800ms 22 Jan 2025 745th Chinay-Domitrix 🇺🇸 204 773 3,388ms 15 Apr 2025 750th msbranicky 202 590 122ms 3 Oct 2023 751st KatieLG-Transpiler 🇬🇧 201 833 98ms 2 Sep 2023 752nd dranjohn 200 437 10ms 11 Sep 2023 753rd HumanoidCPU 199 409 51ms 10 Jan 2025 754th dokutan 199 423 55ms 7 Apr 2024 754th HumanoidCPU 199 423 60ms 17 Apr 2024 756th MeWhenI 🇻🇦 199 776 5ms 1 Sep 2023 756th Shanethegamer 🇺🇸 199 776 5ms 1 Sep 2023 756th KatieLG 🇬🇧 199 776 5ms 2 Sep 2023 756th KatieLG-Transpiler 🇬🇧 199 776 5ms 2 Sep 2023 756th scpchicken 🇵🇼 199 776 5ms 14 Nov 2023 756th HumanoidCPU 199 776 5ms 4 May 2024 756th dokutan 199 776 5ms 24 Jun 2024 756th Mabeloid 🇳🇴 199 776 5ms 21 Sep 2024 756th CaedenHarper 🇨🇦 199 776 6ms 20 Jan 2025 765th snoozingnewt 🇨🇦 198 781 5ms 5 Sep 2023 766th Shanethegamer 🇺🇸 198 794 1ms 1 Sep 2023 766th HumanoidCPU 198 794 1ms 16 Jun 2024 766th snoozingnewt 🇨🇦 198 794 2ms 1 Sep 2024 766th CaedenHarper 🇨🇦 198 794 1ms 24 Jan 2025 766th fuzzylojik-golf 🇺🇸 198 794 2ms 8 Jul 2025 771st MeWhenI 🇻🇦 197 796 1ms 1 Sep 2023 772nd KatieLG 🇬🇧 197 798 1ms 2 Sep 2023 772nd Mabeloid 🇳🇴 197 798 1ms 21 Sep 2024 774th KatieLG-Transpiler 🇬🇧 196 801 2ms 2 Sep 2023 775th XenThe 🇬🇧 195 541 9ms 15 Jul 2025 776th KatieLG 🇬🇧 193 422 39ms 2 Oct 2025 777th dokutan 193 542 124ms 6 Nov 2024 778th JRaspass 🇬🇧 193 545 3ms 3 Sep 2023 779th JOrE20 🇺🇸 193 546 8ms 10 Nov 2025 780th CaedenHarper 🇨🇦 193 837 1,699ms 22 Jan 2025 780th dokutan 193 837 1,776ms 13 Sep 2025 780th Shanethegamer 🇺🇸 193 837 1,664ms 28 Sep 2025 783rd HumanoidCPU 193 838 1,725ms 13 Sep 2025 784th Shanethegamer 🇺🇸 192 776 70ms 1 Sep 2023 784th MeWhenI 🇻🇦 192 776 81ms 1 Sep 2023 784th KatieLG 🇬🇧 192 776 64ms 2 Sep 2023 784th KatieLG-Transpiler 🇬🇧 192 776 68ms 2 Sep 2023 784th HumanoidCPU 192 776 70ms 16 Apr 2024 784th Mabeloid 🇳🇴 192 776 68ms 21 Sep 2024 784th CaedenHarper 🇨🇦 192 776 65ms 20 Jan 2025 784th gigaprofisi 🇺🇸 192 776 64ms 13 Nov 2025 792nd heanyang1 191 329 2ms 24 May 2025 792nd BREMAUCY 🇫🇷 191 329 2ms 1 Nov 2025 794th MeWhenI 🇻🇦 191 551 3ms 1 Sep 2023 795th coreynash 188 563 8ms 16 Feb 2024 796th olleicua 🇺🇸 185 572 9ms 13 Feb 2024 797th Shanethegamer 🇺🇸 185 798 421ms 25 Sep 2025 797th HumanoidCPU 185 798 412ms 8 Nov 2025 799th Ripick 184 343 2ms 22 Oct 2025 800th Stockoh 🇫🇷 184 474 14ms 30 Sep 2024 First Prev 721–800 of 1,342 Next Last