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 adriweb 🇫🇷 711 206 2ms 1 Sep 2023 241st stefangimmillaro 711 206 413ms 6 Oct 2025 243rd sean-niemann 🇺🇸 708 207 447ms 26 Sep 2025 244th lifthrasiir 🇰🇷 707 101 3ms 30 Nov 2024 245th Argeento 🇵🇱 705 187 9ms 4 Oct 2023 246th jacobly0 🇺🇸 704 208 2ms 15 Oct 2023 247th MeWhenI 🇻🇦 703 471 3ms 1 Sep 2023 248th jared-hughes 702 174 10ms 5 Sep 2023 249th sean-niemann 🇺🇸 701 195 393ms 20 Jun 2025 250th m-tkach 🇺🇦 699 287 33ms 18 Jan 2024 251st lynn 698 274 185ms 12 Jun 2024 252nd error256 696 173 377ms 9 Oct 2024 253rd stefangimmillaro 696 224 4,123ms 11 Nov 2024 254th MostParsingVex 693 225 4,115ms 11 Nov 2024 255th weliveinhell 🇭🇹 692 174 277ms 6 Jan 2024 256th acotis 690 170 139ms 29 May 2025 257th sean-niemann 🇺🇸 689 182 143ms 21 Oct 2025 258th IanUtley 684 274 596ms 4 Feb 2025 259th trinityy-7 684 484 3ms 11 Feb 2024 260th adamnielson42 🇺🇸 680 107 223ms 6 Sep 2023 260th CaedenHarper 🇨🇦 680 107 294ms 30 Jan 2025 262nd CaedenHarper 🇨🇦 680 175 1,465ms 23 Oct 2025 262nd albanian-laundromat 680 175 1,144ms 25 Oct 2025 264th stefangimmillaro 676 158 1,664ms 9 Sep 2023 265th MeWhenI 🇻🇦 676 195 10ms 3 Aug 2024 266th edsrzf 🇳🇿 676 346 5ms 18 Oct 2025 267th lyphyser 675 174 133ms 8 Sep 2023 268th weliveinhell 🇭🇹 673 196 9ms 6 Jan 2024 269th stefangimmillaro 672 216 273ms 9 Sep 2023 270th guilhem-roy 🇫🇷 668 183 9ms 10 Jul 2024 271st snoozingnewt 🇨🇦 667 188 640ms 3 Nov 2025 272nd namelessiw 667 205 386ms 21 Jul 2025 273rd SirBogman 🇺🇸 666 166 331ms 21 Sep 2023 274th KrausRaus 🇺🇸 666 198 8ms 27 Sep 2023 275th CaedenHarper 🇨🇦 659 200 12ms 7 Sep 2025 276th m-tkach 🇺🇦 657 186 23ms 10 Nov 2023 277th uttumuttu 🇫🇮 656 201 9ms 4 Sep 2023 278th stefangimmillaro 654 187 2,919ms 9 Sep 2023 278th MarcMush 🇫🇷 654 187 1,051ms 7 Jan 2024 278th FortuiteMan 🇫🇷 654 187 9ms 26 days ago 278th Lv0Sys 🇵🇱 654 187 11ms 14 days ago 282nd pardouin 🇫🇷 651 210 416ms 25 Oct 2024 283rd snoozingnewt 🇨🇦 650 188 24ms 3 Nov 2025 284th CaedenHarper 🇨🇦 650 193 528ms 14 Aug 2025 285th stefangimmillaro 650 204 27ms 17 Sep 2023 285th targrik 650 204 7ms 15 May 2025 287th emgordon154 649 203 9ms 20 Oct 2024 288th pardouin 🇫🇷 648 130 930ms 10 Aug 2025 289th pardouin 🇫🇷 645 227 431ms 24 Sep 2025 290th neel11235813 644 113 217ms 10 Oct 2023 291st SirBogman 🇺🇸 644 116 2ms 11 Jan 2024 292nd MeWhenI 🇻🇦 640 186 730ms 15 Sep 2025 293rd SirBogman 🇺🇸 634 231 405ms 27 Sep 2023 294th CaedenHarper 🇨🇦 633 193 132ms 14 Aug 2025 295th blaztoma 🇱🇹 632 169 54ms 19 Oct 2025 296th KatieLG 🇬🇧 630 526 4ms 7 Jun 2025 297th weliveinhell 🇭🇹 628 119 2ms 16 Jan 2024 297th error256 628 119 1ms 27 May 2024 299th dvargas46 🇺🇸 626 164 7ms 7 Sep 2023 300th GolfingSuccess 🇬🇷 625 528 7ms 20 Dec 2024 301st CaedenHarper 🇨🇦 623 235 456ms 10 Oct 2025 302nd madeforlosers 622 212 9ms 5 Nov 2024 303rd rucin93 🇵🇱 618 203 141ms 3 Aug 2024 304th DialFrost 🇸🇬 618 237 368ms 24 Sep 2025 305th GrayJoKing 🇦🇺 617 209 75ms 13 Sep 2024 306th blaztoma 🇱🇹 616 118 269ms 19 Oct 2025 307th CLOStrophobic 🇮🇹 616 298 7ms 18 Feb 2025 308th emgordon154 609 206 598ms 20 Oct 2024 309th dokutan 609 682 400ms 11 days ago 310th ovs-code 🇩🇪 608 123 1ms 18 Apr 2025 311th stefangimmillaro 607 222 41ms 26 Apr 2025 312th CaedenHarper 🇨🇦 607 239 275ms 4 Nov 2025 313th msbranicky 607 546 3ms 1 Sep 2023 314th duckyluuk 🇳🇱 606 207 3,169ms 30 Jul 2025 315th InigoK 🇺🇸 605 202 153ms 10 Sep 2025 316th BambooleanLogic 🇸🇪 605 218 10ms 17 Sep 2023 316th janbehrens 🇩🇪 605 218 9ms 30 Dec 2023 318th eranws 602 219 8ms 3 Sep 2023 319th klixel 🇨🇦 599 204 3,452ms 20 Jul 2025 319th emgordon154 599 204 40ms 22 Sep 2025 First Prev 241–320 of 1,372 Next Last