The Calendar hole will go live in approximately 8 days. Why not try and solve it ahead of time?
Rijndael S-box in all languages 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 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 Bytes Time Submitted 241st CornerMercury 🇬🇧 711 172 54ms 27 days ago 242nd adriweb 🇫🇷 711 206 2ms 1 Sep 2023 242nd stefangimmillaro 711 206 413ms 6 Oct 2025 244th sean-niemann 🇺🇸 708 207 447ms 26 Sep 2025 245th lifthrasiir 🇰🇷 707 101 3ms 30 Nov 2024 246th Argeento 🇵🇱 705 187 9ms 4 Oct 2023 247th jacobly0 🇺🇸 704 208 2ms 15 Oct 2023 248th MeWhenI 🇻🇦 703 471 3ms 1 Sep 2023 249th jared-hughes 702 174 10ms 5 Sep 2023 250th sean-niemann 🇺🇸 701 195 393ms 20 Jun 2025 251st m-tkach 🇺🇦 699 287 33ms 18 Jan 2024 252nd lynn 698 274 185ms 12 Jun 2024 253rd error256 696 173 377ms 9 Oct 2024 254th stefangimmillaro 696 224 4,123ms 11 Nov 2024 255th MostParsingVex 693 225 4,115ms 11 Nov 2024 256th weliveinhell 🇭🇹 692 174 277ms 6 Jan 2024 257th acotis 690 170 139ms 29 May 2025 258th sean-niemann 🇺🇸 689 182 143ms 21 Oct 2025 259th IanUtley 684 274 596ms 4 Feb 2025 260th trinityy-7 684 484 3ms 11 Feb 2024 261st adamnielson42 🇺🇸 680 107 223ms 6 Sep 2023 261st CaedenHarper 🇨🇦 680 107 294ms 30 Jan 2025 263rd CaedenHarper 🇨🇦 680 175 1,465ms 23 Oct 2025 263rd albanian-laundromat 680 175 1,144ms 25 Oct 2025 265th stefangimmillaro 676 158 1,664ms 9 Sep 2023 266th MeWhenI 🇻🇦 676 195 10ms 3 Aug 2024 267th edsrzf 🇳🇿 676 346 5ms 18 Oct 2025 268th lyphyser 675 174 133ms 8 Sep 2023 269th weliveinhell 🇭🇹 673 196 9ms 6 Jan 2024 270th stefangimmillaro 672 216 273ms 9 Sep 2023 271st guilhem-roy 🇫🇷 668 183 9ms 10 Jul 2024 272nd snoozingnewt 🇨🇦 667 188 640ms 3 Nov 2025 273rd namelessiw 667 205 386ms 21 Jul 2025 274th SirBogman 🇺🇸 666 166 331ms 21 Sep 2023 275th KrausRaus 🇺🇸 666 198 8ms 27 Sep 2023 276th CaedenHarper 🇨🇦 659 200 12ms 7 Sep 2025 277th m-tkach 🇺🇦 657 186 23ms 10 Nov 2023 278th uttumuttu 🇫🇮 656 201 9ms 4 Sep 2023 279th stefangimmillaro 654 187 2,919ms 9 Sep 2023 279th MarcMush 🇫🇷 654 187 1,051ms 7 Jan 2024 279th FortuiteMan 🇫🇷 654 187 9ms 26 days ago 279th Lv0Sys 🇵🇱 654 187 11ms 15 days ago 283rd pardouin 🇫🇷 651 210 416ms 25 Oct 2024 284th snoozingnewt 🇨🇦 650 188 24ms 3 Nov 2025 285th CaedenHarper 🇨🇦 650 193 528ms 14 Aug 2025 286th stefangimmillaro 650 204 27ms 17 Sep 2023 286th targrik 650 204 7ms 15 May 2025 288th emgordon154 649 203 9ms 20 Oct 2024 289th pardouin 🇫🇷 648 130 930ms 10 Aug 2025 290th pardouin 🇫🇷 645 227 431ms 24 Sep 2025 291st neel11235813 644 113 217ms 10 Oct 2023 292nd SirBogman 🇺🇸 644 116 2ms 11 Jan 2024 293rd MeWhenI 🇻🇦 640 186 730ms 15 Sep 2025 294th SirBogman 🇺🇸 634 231 405ms 27 Sep 2023 295th CaedenHarper 🇨🇦 633 193 132ms 14 Aug 2025 296th blaztoma 🇱🇹 632 169 54ms 19 Oct 2025 297th KatieLG 🇬🇧 630 526 4ms 7 Jun 2025 298th weliveinhell 🇭🇹 628 119 2ms 16 Jan 2024 298th error256 628 119 1ms 27 May 2024 300th dvargas46 🇺🇸 626 164 7ms 7 Sep 2023 301st GolfingSuccess 🇬🇷 625 528 7ms 20 Dec 2024 302nd CaedenHarper 🇨🇦 623 235 456ms 10 Oct 2025 303rd madeforlosers 622 212 9ms 5 Nov 2024 304th rucin93 🇵🇱 618 203 141ms 3 Aug 2024 305th DialFrost 🇸🇬 618 237 368ms 24 Sep 2025 306th GrayJoKing 🇦🇺 617 209 75ms 13 Sep 2024 307th blaztoma 🇱🇹 616 118 269ms 19 Oct 2025 308th CLOStrophobic 🇮🇹 616 298 7ms 18 Feb 2025 309th emgordon154 609 206 598ms 20 Oct 2024 310th dokutan 609 682 400ms 11 days ago 311th ovs-code 🇩🇪 608 123 1ms 18 Apr 2025 312th stefangimmillaro 607 222 41ms 26 Apr 2025 313th CaedenHarper 🇨🇦 607 239 275ms 4 Nov 2025 314th msbranicky 607 546 3ms 1 Sep 2023 315th duckyluuk 🇳🇱 606 207 3,169ms 30 Jul 2025 316th InigoK 🇺🇸 605 202 153ms 10 Sep 2025 317th BambooleanLogic 🇸🇪 605 218 10ms 17 Sep 2023 317th janbehrens 🇩🇪 605 218 9ms 30 Dec 2023 319th eranws 602 219 8ms 3 Sep 2023 320th klixel 🇨🇦 599 204 3,452ms 20 Jul 2025 First Prev 241–320 of 1,373 Next Last