The Calendar hole will go live in approximately 11 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 561st rifatx 335 223 1ms 16 Jul 2024 562nd snoozingnewt 🇨🇦 334 224 1ms 4 Nov 2025 563rd Maximizer02 332 578 6ms 22 Mar 2024 564th codereport 🇨🇦 331 226 2ms 18 Apr 2025 565th Stanbroek 330 291 73ms 18 Sep 2023 566th gastropner 329 227 1ms 17 Jul 2025 567th dokutan 327 665 2ms 12 Mar 2025 568th KatieLG 🇬🇧 325 783 1ms 2 Sep 2023 568th snoozingnewt 🇨🇦 325 783 1ms 7 Sep 2023 568th Shanethegamer 🇺🇸 325 783 1ms 16 Jan 2024 568th HumanoidCPU 325 783 1ms 16 Apr 2024 568th CaedenHarper 🇨🇦 325 783 1ms 22 Jan 2025 573rd KatieLG-Transpiler 🇬🇧 324 784 1ms 2 Sep 2023 573rd Mabeloid 🇳🇴 324 784 1ms 21 Sep 2024 575th msbranicky 324 785 1ms 20 Sep 2023 576th frankgraziano 323 318 4,993ms 11 Apr 2025 577th Mabeloid 🇳🇴 322 232 2ms 15 Oct 2025 578th msbranicky 322 609 84ms 13 Sep 2023 579th msbranicky 322 623 27ms 21 Sep 2023 580th bac0id 317 236 2ms 8 Jan 2025 581st trinityy-7 315 237 1ms 10 Oct 2023 582nd TheEric0802 🇩🇪 314 622 3ms 22 Sep 2023 583rd msbranicky 313 614 6ms 24 Dec 2023 584th peachey2k2 311 240 3ms 27 days ago 585th c0d3-4-F00d 🇩🇪 310 241 2ms 4 Dec 2023 586th helbling 🇨🇭 309 242 2ms 25 Jul 2024 587th Martymoose98 306 244 1ms 30 May 2025 588th KatieLG 🇬🇧 306 712 3ms 22 Aug 2024 589th dokutan 297 788 4ms 1 Aug 2024 589th Shanethegamer 🇺🇸 297 788 3ms 6 Dec 2024 589th CaedenHarper 🇨🇦 297 788 3ms 20 Jan 2025 589th BREMAUCY 🇫🇷 297 788 3ms 13 Aug 2025 589th fuzzylojik-golf 🇺🇸 297 788 3ms 7 Sep 2025 594th gigaprofisi 🇺🇸 294 254 2ms 16 Jul 2025 595th Shanethegamer 🇺🇸 294 776 70ms 1 Sep 2023 595th MeWhenI 🇻🇦 294 776 81ms 1 Sep 2023 595th KatieLG 🇬🇧 294 776 64ms 2 Sep 2023 595th KatieLG-Transpiler 🇬🇧 294 776 68ms 2 Sep 2023 595th snoozingnewt 🇨🇦 294 776 67ms 11 Oct 2023 595th HumanoidCPU 294 776 70ms 16 Apr 2024 595th Mabeloid 🇳🇴 294 776 68ms 21 Sep 2024 595th CaedenHarper 🇨🇦 294 776 65ms 20 Jan 2025 595th gigaprofisi 🇺🇸 294 776 64ms 13 Nov 2025 604th tatzyr 🇯🇵 291 367 52ms 11 Feb 2025 605th Emutis 🇱🇹 291 420 16ms 5 Oct 2025 606th kallmi28 🇨🇿 290 258 2ms 8 Nov 2023 607th msbranicky 288 637 6ms 1 Sep 2023 608th Shanethegamer 🇺🇸 288 788 98ms 15 days ago 609th yzhs 🇩🇪 287 260 1ms 24 Mar 2024 610th HumanoidCPU 287 790 103ms 4 Aug 2025 611th dokutan 285 1,780 5ms 6 Dec 2023 612th neel11235813 285 1,783 5ms 20 Nov 2023 613th KatieLG 🇬🇧 282 805 111ms 20 Apr 2025 613th CaedenHarper 🇨🇦 282 805 103ms 18 days ago 615th dranjohn 280 437 10ms 11 Sep 2023 616th roguh 🇬🇹 279 268 2ms 23 Jan 2024 617th MeWhenI 🇻🇦 278 773 13ms 1 Sep 2023 617th Shanethegamer 🇺🇸 278 773 13ms 1 Sep 2023 617th snoozingnewt 🇨🇦 278 773 13ms 2 Sep 2023 617th msbranicky 278 773 13ms 13 Sep 2023 617th theunofficialcoder 278 773 13ms 7 Jan 2024 617th KatieLG 🇬🇧 278 773 14ms 17 Mar 2024 617th HumanoidCPU 278 773 13ms 16 Apr 2024 617th Mabeloid 🇳🇴 278 773 13ms 21 Sep 2024 617th CaedenHarper 🇨🇦 278 773 13ms 22 Jan 2025 617th JunkIce 278 773 13ms 24 Jan 2025 627th Shanethegamer 🇺🇸 278 783 2ms 1 Sep 2023 627th theunofficialcoder 278 783 2ms 21 Jan 2024 627th Mabeloid 🇳🇴 278 783 3ms 21 Sep 2024 627th CaedenHarper 🇨🇦 278 783 2ms 22 Jan 2025 631st annaproxy 277 270 2ms 1 Sep 2023 632nd KatieLG-Transpiler 🇬🇧 277 787 2ms 2 Sep 2023 633rd crizin 🇰🇷 274 534 374ms 15 Sep 2023 634th Shanethegamer 🇺🇸 273 448 411ms 1 Sep 2023 635th dokutan 273 569 2ms 6 Jun 2024 636th dokutan 273 572 3,281ms 24 Oct 2024 637th CaedenHarper 🇨🇦 273 1,862 5ms 17 Aug 2025 638th alphafalfa 272 572 14ms 1 Aug 2025 639th theunofficialcoder 271 862 3ms 21 Jan 2024 639th plcc0 271 862 3ms 10 Apr 2025 First Prev 561–640 of 1,368 Next Last